When I take a screenshot I have the default file format as "Screen Shot 2014-05-29 at 4.24.34 pm". Is there anyway to remove the AM and PM from the end? For what I do it is very annoying to have this sort the screenshots out of order

I'm going to guess no since it's just grabbing the system time but if anyone could help that'd be appreciated.


3 Answers 3


Open your System Preferences

  • Language & Region

  • Check the 24 hr box

enter image description here


For OSX 10.10.5 Yosemite

Please note there are two different locations in your time settings.

The one that is located on the 3rd tab "Clock" does NOT change the format of your screen shots:

enter image description here Select the 1st tab "Date & Time", then select the "Open Language & Region" button on this page. Then, check the "Time Format [checkbox] 24-Hour Time"

This should fix your problem.

enter image description here


If you'd like to do that for screenshot but not change the time format in e.g. top status bar, check out the solution at https://apple.stackexchange.com/a/353015/133626

Steps quoted from the above link:

System PreferencesLanguage & Region, then click Advanced..., choose the Times tab and for the Medium format click the hour dropdown and switch it from 1-12 to 00-23 and delete the AM/PM element.

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  • @fsb, thanks for your reminder. I've added the core answer to the question.
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    Commented Feb 24, 2020 at 0:46

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