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I want to quit a certain applications on my Mac using Terminal. For example, how do I kill “Slack”? Do I need its PID number?

macos terminal command-line

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edited Mar 29 at 1:23

bmike♦

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21

3

I want to quit a certain applications on my Mac using Terminal. For example, how do I kill “Slack”? Do I need its PID number?

macos terminal command-line

share|improve this question

edited Mar 29 at 1:23

bmike♦

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asked Mar 27 at 14:15

BrainmaniacBrainmaniac

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add a comment | 

I want to quit a certain applications on my Mac using Terminal. For example, how do I kill “Slack”? Do I need its PID number?

macos terminal command-line

share|improve this question

edited Mar 29 at 1:23

bmike♦

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asked Mar 27 at 14:15

BrainmaniacBrainmaniac

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edited Mar 29 at 1:23

bmike♦

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asked Mar 27 at 14:15

BrainmaniacBrainmaniac

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edited Mar 29 at 1:23

bmike♦

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edited Mar 29 at 1:23

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edited Mar 29 at 1:23

bmike♦

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5 Answers
5

active

oldest

votes

24

No, you do not need to know its PID.

You can use:

pkill -x Slack

Or:

killall Slack

---

Note: Be sure to read the manual page for whichever command you choose to use, in order to see the various options available to the command, as may be relevant to its particular usage. In Terminal type e.g. man pkill and press enter, or just type the command and right-click on it, then select: Open man Page

share|improve this answer

edited Mar 29 at 0:50

answered Mar 27 at 14:26

user3439894user3439894

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add a comment | 

18

You can use AppleScript to tell the application to quit:

osascript -e 'quit app "Slack"'

this will tell the application to quit and will start all the save and cleanup tasks. Or you can send the TERM signal with pkill but it could be that the application will not shut down cleanly

pkill -x Slack

share|improve this answer

edited Mar 28 at 21:17

answered Mar 28 at 6:52

MatteoMatteo

5,5141313 gold badges5858 silver badges102102 bronze badges

• 
  
  
  

  
  7
  

  
  
  
  
  
  

  
  
  This is the best method, because it replicates what happens when you use File>Quit from the menu.
  
  – Barmar
  Mar 28 at 16:15
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Huh. I've always used osascript -e 'tell application "Slack" to quit' but if the shorter syntax works, then that's obviously preferable. This is definitely a better answer than anything suggesting kill or any of its variants.
  
  – TJ Luoma
  Mar 30 at 2:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @TJLuoma I think if you select the correct signal, then pkill is as graceful as any other method. I too favour the AppleScript, though created a function quit to make it breezy. However, if creating an AppleScript process isn’t necessary, pkill -QUIT -x Slack should be fine.
  
  – CJK
  Apr 17 at 20:50
  

  
  
  
  

add a comment | 

12

Since I don't yet have the reputation to comment, I'm saying this as a separate answer. pkill without any flags does not match a specific process! For example, running pkill foo would target processes named foo, but would also target processes named foobar. This is because it uses regular expressions.

If you wish to kill a specific process, you can pass it the -x flag. For example, pkill -x foo. This will use exact names instead of regular expressions.

For example, in your case, pkill -x Slack will do the trick.

share|improve this answer

edited Mar 29 at 21:36

answered Mar 27 at 21:59

user321134user321134

14355 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  To turn this into a full answer can you please add the name of the Slack process to kill?
  
  – nohillside♦
  Mar 29 at 16:48
  

  
  
  
  

add a comment | 

8

You can install htop (via brew for instance).

You'll need to run this as root or with sudo. Essentially, it's a text
based Activity Monitor.

Select the process you want to kill (either with arrow keys or a mouse).

Then press k to send the process a signal and then 9 to choose the SIGKILL signal.

share|improve this answer

edited Mar 29 at 0:42

Dancrumb

12555 bronze badges

answered Mar 27 at 17:20

BEFioBEFio

8111 bronze badge

We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

add a comment | 

6

I'm not sure for Slack, but some Applications will run multiple Processes and you may want to kill just one (I find I often need to do this with iTunes, for example). In that case, you can run

ps -e | grep -i slack

To find all Processes with case-insensitive "slack" in the name. The output should look like (without the header):

PID TTY TIME CMD
649 pts/1 00:00:00 bash

That first column will be your PID. You can then use that to kill specifically that process:

kill -9 649

Replacing 649 with your PID you found from calling ps.

share|improve this answer

answered Mar 27 at 18:57

scohe001scohe001

35711 gold badge33 silver badges1010 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  kill sends a signal to terminate the app. It is not necessary to use -9 (kill) if the application is responding. You risk to loose unsaved data
  
  – Matteo
  Mar 28 at 17:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Similarly, if you did happen to want to kill, say, all 5 instances of some named process, you could filter the output of ps on the CMD value and then kill all the first entries on those lines.
  
  – Carl Witthoft
  Mar 29 at 14:59
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Carl Witthoft, you can simply use killall procname, e.g. killall Slack and it will kill all occurrences of Slack or whatever procname is. No need to use ps!
  
  – user3439894
  Mar 29 at 22:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So, pgrep is a nice command that combines ps and grip.
  
  – Harv
  Apr 3 at 0:47
  
  

  
  
  
  

add a comment | 

24

No, you do not need to know its PID.

You can use:

pkill -x Slack

Or:

killall Slack

---

Note: Be sure to read the manual page for whichever command you choose to use, in order to see the various options available to the command, as may be relevant to its particular usage. In Terminal type e.g. man pkill and press enter, or just type the command and right-click on it, then select: Open man Page

share|improve this answer

edited Mar 29 at 0:50

answered Mar 27 at 14:26

user3439894user3439894

31.8k77 gold badges4949 silver badges7070 bronze badges

add a comment | 

24

No, you do not need to know its PID.

You can use:

pkill -x Slack

Or:

killall Slack

---

Note: Be sure to read the manual page for whichever command you choose to use, in order to see the various options available to the command, as may be relevant to its particular usage. In Terminal type e.g. man pkill and press enter, or just type the command and right-click on it, then select: Open man Page

share|improve this answer

edited Mar 29 at 0:50

answered Mar 27 at 14:26

user3439894user3439894

31.8k77 gold badges4949 silver badges7070 bronze badges

add a comment | 

No, you do not need to know its PID.

You can use:

pkill -x Slack

Or:

killall Slack

---

Note: Be sure to read the manual page for whichever command you choose to use, in order to see the various options available to the command, as may be relevant to its particular usage. In Terminal type e.g. man pkill and press enter, or just type the command and right-click on it, then select: Open man Page

share|improve this answer

edited Mar 29 at 0:50

answered Mar 27 at 14:26

user3439894user3439894

31.8k77 gold badges4949 silver badges7070 bronze badges

pkill -x Slack

killall Slack

share|improve this answer

edited Mar 29 at 0:50

answered Mar 27 at 14:26

user3439894user3439894

31.8k77 gold badges4949 silver badges7070 bronze badges

answered Mar 27 at 14:26

user3439894user3439894

31.8k77 gold badges4949 silver badges7070 bronze badges

answered Mar 27 at 14:26

user3439894user3439894

31.8k77 gold badges4949 silver badges7070 bronze badges

18

You can use AppleScript to tell the application to quit:

osascript -e 'quit app "Slack"'

this will tell the application to quit and will start all the save and cleanup tasks. Or you can send the TERM signal with pkill but it could be that the application will not shut down cleanly

pkill -x Slack

share|improve this answer

edited Mar 28 at 21:17

answered Mar 28 at 6:52

MatteoMatteo

5,5141313 gold badges5858 silver badges102102 bronze badges

• 
  
  
  

  
  7
  

  
  
  
  
  
  

  
  
  This is the best method, because it replicates what happens when you use File>Quit from the menu.
  
  – Barmar
  Mar 28 at 16:15
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Huh. I've always used osascript -e 'tell application "Slack" to quit' but if the shorter syntax works, then that's obviously preferable. This is definitely a better answer than anything suggesting kill or any of its variants.
  
  – TJ Luoma
  Mar 30 at 2:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @TJLuoma I think if you select the correct signal, then pkill is as graceful as any other method. I too favour the AppleScript, though created a function quit to make it breezy. However, if creating an AppleScript process isn’t necessary, pkill -QUIT -x Slack should be fine.
  
  – CJK
  Apr 17 at 20:50
  

  
  
  
  

add a comment | 

18

You can use AppleScript to tell the application to quit:

osascript -e 'quit app "Slack"'

this will tell the application to quit and will start all the save and cleanup tasks. Or you can send the TERM signal with pkill but it could be that the application will not shut down cleanly

pkill -x Slack

share|improve this answer

edited Mar 28 at 21:17

answered Mar 28 at 6:52

MatteoMatteo

5,5141313 gold badges5858 silver badges102102 bronze badges

• 
  
  
  

  
  7
  

  
  
  
  
  
  

  
  
  This is the best method, because it replicates what happens when you use File>Quit from the menu.
  
  – Barmar
  Mar 28 at 16:15
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Huh. I've always used osascript -e 'tell application "Slack" to quit' but if the shorter syntax works, then that's obviously preferable. This is definitely a better answer than anything suggesting kill or any of its variants.
  
  – TJ Luoma
  Mar 30 at 2:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @TJLuoma I think if you select the correct signal, then pkill is as graceful as any other method. I too favour the AppleScript, though created a function quit to make it breezy. However, if creating an AppleScript process isn’t necessary, pkill -QUIT -x Slack should be fine.
  
  – CJK
  Apr 17 at 20:50
  

  
  
  
  

add a comment | 

You can use AppleScript to tell the application to quit:

osascript -e 'quit app "Slack"'

this will tell the application to quit and will start all the save and cleanup tasks. Or you can send the TERM signal with pkill but it could be that the application will not shut down cleanly

pkill -x Slack

share|improve this answer

edited Mar 28 at 21:17

answered Mar 28 at 6:52

MatteoMatteo

5,5141313 gold badges5858 silver badges102102 bronze badges

osascript -e 'quit app "Slack"'

pkill -x Slack

share|improve this answer

edited Mar 28 at 21:17

answered Mar 28 at 6:52

MatteoMatteo

5,5141313 gold badges5858 silver badges102102 bronze badges

answered Mar 28 at 6:52

MatteoMatteo

5,5141313 gold badges5858 silver badges102102 bronze badges

answered Mar 28 at 6:52

MatteoMatteo

5,5141313 gold badges5858 silver badges102102 bronze badges

12

Since I don't yet have the reputation to comment, I'm saying this as a separate answer. pkill without any flags does not match a specific process! For example, running pkill foo would target processes named foo, but would also target processes named foobar. This is because it uses regular expressions.

If you wish to kill a specific process, you can pass it the -x flag. For example, pkill -x foo. This will use exact names instead of regular expressions.

For example, in your case, pkill -x Slack will do the trick.

share|improve this answer

edited Mar 29 at 21:36

answered Mar 27 at 21:59

user321134user321134

14355 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  To turn this into a full answer can you please add the name of the Slack process to kill?
  
  – nohillside♦
  Mar 29 at 16:48
  

  
  
  
  

add a comment | 

12

Since I don't yet have the reputation to comment, I'm saying this as a separate answer. pkill without any flags does not match a specific process! For example, running pkill foo would target processes named foo, but would also target processes named foobar. This is because it uses regular expressions.

If you wish to kill a specific process, you can pass it the -x flag. For example, pkill -x foo. This will use exact names instead of regular expressions.

For example, in your case, pkill -x Slack will do the trick.

share|improve this answer

edited Mar 29 at 21:36

answered Mar 27 at 21:59

user321134user321134

14355 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  To turn this into a full answer can you please add the name of the Slack process to kill?
  
  – nohillside♦
  Mar 29 at 16:48
  

  
  
  
  

add a comment | 

Since I don't yet have the reputation to comment, I'm saying this as a separate answer. pkill without any flags does not match a specific process! For example, running pkill foo would target processes named foo, but would also target processes named foobar. This is because it uses regular expressions.

If you wish to kill a specific process, you can pass it the -x flag. For example, pkill -x foo. This will use exact names instead of regular expressions.

For example, in your case, pkill -x Slack will do the trick.

share|improve this answer

edited Mar 29 at 21:36

answered Mar 27 at 21:59

user321134user321134

14355 bronze badges

share|improve this answer

edited Mar 29 at 21:36

answered Mar 27 at 21:59

user321134user321134

14355 bronze badges

answered Mar 27 at 21:59

user321134user321134

14355 bronze badges

answered Mar 27 at 21:59

user321134user321134

14355 bronze badges

8

You can install htop (via brew for instance).

You'll need to run this as root or with sudo. Essentially, it's a text
based Activity Monitor.

Select the process you want to kill (either with arrow keys or a mouse).

Then press k to send the process a signal and then 9 to choose the SIGKILL signal.

share|improve this answer

edited Mar 29 at 0:42

Dancrumb

12555 bronze badges

answered Mar 27 at 17:20

BEFioBEFio

8111 bronze badge

We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

add a comment | 

8

You can install htop (via brew for instance).

You'll need to run this as root or with sudo. Essentially, it's a text
based Activity Monitor.

Select the process you want to kill (either with arrow keys or a mouse).

Then press k to send the process a signal and then 9 to choose the SIGKILL signal.

share|improve this answer

edited Mar 29 at 0:42

Dancrumb

12555 bronze badges

answered Mar 27 at 17:20

BEFioBEFio

8111 bronze badge

We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

add a comment | 

You can install htop (via brew for instance).

You'll need to run this as root or with sudo. Essentially, it's a text
based Activity Monitor.

Select the process you want to kill (either with arrow keys or a mouse).

Then press k to send the process a signal and then 9 to choose the SIGKILL signal.

share|improve this answer

edited Mar 29 at 0:42

Dancrumb

12555 bronze badges

answered Mar 27 at 17:20

BEFioBEFio

8111 bronze badge

share|improve this answer

edited Mar 29 at 0:42

Dancrumb

12555 bronze badges

answered Mar 27 at 17:20

BEFioBEFio

8111 bronze badge

edited Mar 29 at 0:42

Dancrumb

12555 bronze badges

edited Mar 29 at 0:42

Dancrumb

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answered Mar 27 at 17:20

BEFioBEFio

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answered Mar 27 at 17:20

BEFioBEFio

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6

I'm not sure for Slack, but some Applications will run multiple Processes and you may want to kill just one (I find I often need to do this with iTunes, for example). In that case, you can run

ps -e | grep -i slack

To find all Processes with case-insensitive "slack" in the name. The output should look like (without the header):

PID TTY TIME CMD
649 pts/1 00:00:00 bash

That first column will be your PID. You can then use that to kill specifically that process:

kill -9 649

Replacing 649 with your PID you found from calling ps.

share|improve this answer

answered Mar 27 at 18:57

scohe001scohe001

35711 gold badge33 silver badges1010 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  kill sends a signal to terminate the app. It is not necessary to use -9 (kill) if the application is responding. You risk to loose unsaved data
  
  – Matteo
  Mar 28 at 17:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Similarly, if you did happen to want to kill, say, all 5 instances of some named process, you could filter the output of ps on the CMD value and then kill all the first entries on those lines.
  
  – Carl Witthoft
  Mar 29 at 14:59
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Carl Witthoft, you can simply use killall procname, e.g. killall Slack and it will kill all occurrences of Slack or whatever procname is. No need to use ps!
  
  – user3439894
  Mar 29 at 22:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So, pgrep is a nice command that combines ps and grip.
  
  – Harv
  Apr 3 at 0:47
  
  

  
  
  
  

add a comment | 

6

I'm not sure for Slack, but some Applications will run multiple Processes and you may want to kill just one (I find I often need to do this with iTunes, for example). In that case, you can run

ps -e | grep -i slack

To find all Processes with case-insensitive "slack" in the name. The output should look like (without the header):

PID TTY TIME CMD
649 pts/1 00:00:00 bash

That first column will be your PID. You can then use that to kill specifically that process:

kill -9 649

Replacing 649 with your PID you found from calling ps.

share|improve this answer

answered Mar 27 at 18:57

scohe001scohe001

35711 gold badge33 silver badges1010 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  kill sends a signal to terminate the app. It is not necessary to use -9 (kill) if the application is responding. You risk to loose unsaved data
  
  – Matteo
  Mar 28 at 17:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Similarly, if you did happen to want to kill, say, all 5 instances of some named process, you could filter the output of ps on the CMD value and then kill all the first entries on those lines.
  
  – Carl Witthoft
  Mar 29 at 14:59
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Carl Witthoft, you can simply use killall procname, e.g. killall Slack and it will kill all occurrences of Slack or whatever procname is. No need to use ps!
  
  – user3439894
  Mar 29 at 22:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So, pgrep is a nice command that combines ps and grip.
  
  – Harv
  Apr 3 at 0:47
  
  

  
  
  
  

add a comment | 

I'm not sure for Slack, but some Applications will run multiple Processes and you may want to kill just one (I find I often need to do this with iTunes, for example). In that case, you can run

ps -e | grep -i slack

To find all Processes with case-insensitive "slack" in the name. The output should look like (without the header):

PID TTY TIME CMD
649 pts/1 00:00:00 bash

That first column will be your PID. You can then use that to kill specifically that process:

kill -9 649

Replacing 649 with your PID you found from calling ps.

share|improve this answer

answered Mar 27 at 18:57

scohe001scohe001

35711 gold badge33 silver badges1010 bronze badges

ps -e | grep -i slack

PID TTY TIME CMD
649 pts/1 00:00:00 bash

kill -9 649

share|improve this answer

answered Mar 27 at 18:57

scohe001scohe001

35711 gold badge33 silver badges1010 bronze badges

answered Mar 27 at 18:57

scohe001scohe001

35711 gold badge33 silver badges1010 bronze badges

answered Mar 27 at 18:57

scohe001scohe001

35711 gold badge33 silver badges1010 bronze badges