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On a Snow Leopard machine, is it safe to delete the contents of the /System/Library/Caches/ directory? In install logs, it is seemingly the cause of a failed install of a kernel extension.

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Try sudo kextcache -e in Terminal first. This rebuilds the kext caches. – Daniel Beck Feb 27 '11 at 20:21
up vote 4 down vote accepted

Yes, deleting the caches just means they'll have to be rebuilt on the next boot, so the next boot will take a few extra seconds.

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