I accidentally deleted system apps like the App Store.app and the Calendar.app.

How can I restore these? I've tried the combo update like suggested for 10.6.6 systems, but that unfortunately doesn't seem to work on 10.8.


Boot to recovery HD and reinstall Mountain Lion if you don't have those backed up to your Time Machine (or equivalent) backup.

  • I hoped not having to reinstall – Erik Aigner Dec 23 '12 at 5:38
  • Backups help not having to reinstall when you delete things - you could see about copying those apps from another similar OS install or hope the 10.8.3 combo update has those apps in their entirety. – bmike Dec 23 '12 at 5:42
  • Yes I just thought of that. I actually have a mini server running 10.8.2 as well, so I'll try just copying it over from there. – Erik Aigner Dec 23 '12 at 5:46
  • Consider backing things up just in case calendar barfs. I can't see it being risky, but you never know.... – bmike Dec 23 '12 at 5:48
  • I usually have a TM backup but this time I just wiped the Time Capsule moments before that to run a completely fresh backup... so bad timing. – Erik Aigner Dec 23 '12 at 6:01

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