Can I delete /Library/SystemMigration after my upgrade to 10.11. I think, there is nothing, that I want to save.


You can delete this folder.

This directory is a backup of shared caches (relevant to application launches) of the old system.

I saved ~ 600 MB from this.

  • I removed my 1.1GB folder with no adverse side effects. – user1133275 Oct 4 '15 at 23:19
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    What steps did you take to "delete" the folder? Was it protected by SIP? Did you disable SIP and then delete it? – bmike Oct 6 '15 at 15:23
  • I would like to know how you deleted it as well. I am unable to delete the folder as "Items are in use". I can't even use "sudo rm -rf" to remove the folder, as it just results in a "Permission Denied" error. – ajkblue Oct 14 '15 at 4:53
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    @ajkblue Just deleted it on my Retina 13". Boot into Recovery Mode, disable SIP from the terminal with csrutil disable, reboot, delete folder, and then renable SIP. – empedocle Oct 15 '15 at 3:56
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    Do you have any reference that could back up your statement about being able to delete this folder? The fact that "the item is in use" sounds like a warning to me… – Eric O Lebigot Oct 22 '15 at 18:30

SIP - Enabled I was able to delete the contents of /Library/SystemMigration/History with enabled SIP by first changing the permissions (CMD-I) and then just removing the folder (~600MB) inside the History folder. OS X 10.11.6


Don't delete this folder! It's doing something important, because when I tried to delete it I saw a message that the files and folders are in use.

  • This folder does nothing useful, and deleting it won't hurt your Mac. – At0mic Oct 6 '15 at 13:51

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