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I just installed Xcode 5.1 and the latest round of updates. I followed that with a Repair Disk Permissions. For some reason, Apple installs its software with broken permissions.

I then ran Repair Disk Permissions (Applications → Utilities → Disk Utility):

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Now, XQuartz will not start:

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In the above, Xquartz cannot write to /tmp after the permission repair because Repair Disk Permissions remove w from the link.

It appears the permissions in Disk Utility are broken out of the box, too. How does one modify the permission used by Disk Utility so that the utility will not break an installation? Is there a plist somewhere that can be tweaked?

I've been suffering these types of problems for years. Its like a death from 10,000 cuts. Why does Apple not test their software before unleashing it on unsuspecting users?

  • Are you asking how to change permissions on tmp or how to change the expected permissions on tmp? – Fyrefly Jul 1 '14 at 14:29
  • I just checked the permissions of my /tmp and it is 733, same as your example. – Fyrefly Jul 1 '14 at 14:34
  • Thanks @Fyrefly - I'd like to know how to modify the permissions used/applied by Disk Utility. I expect its in a plist or data file somewhere. If they are hard coded into Disk Utility, then I'm probably out of luck. – user83961 Jul 1 '14 at 14:35
  • Its my understanding Disk Utility references /Library/Receipts for installed software, I don't know what it references for base system files. – Fyrefly Jul 1 '14 at 14:38
  • My Mac used to always mess up the /tmp write permissions by itself, causing copy/paste and dragging to stop working. It doesn't anymore, and I don't know why. – sudo Jul 2 '14 at 0:28

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