Strange ACLs on OS X System I have a folder on a HFS+ volume I can't delete. I already tried to get rid of the ACLs but somehow this doesn't worked out.

The folder is calles CrashPlan.app.

Here is what the terminal says:

    sh-3.2# ls -ahel@
    total 0
    drwxrwxr-x@ 3 root  admin   102B 23 Okt 22:58 .
        com.apple.backupdelta.MoveChecked      3B 
        com.apple.s stem.Security     68B 
    drwxr-xr-x@ 3 root  wheel   102B 30 Okt 13:21 ..
        com.apple.backupd.SnapshotVolumeFSEventStoreUUID      36B 
        com.apple.backupd.SnapshotVolumeLastFSEventID     20B 
        com.apple.backupd.SnapshotVolumeUUID      36B 
    drwxrwxr-x  2 jan   staff    68B 13 Nov  2012 CrashPlan.app

    sh-3.2# cd CrashPlan.app/
    sh-3.2# ls -ahel@
    total 0
    drwxrwxr-x  2 jan   staff    68B 13 Nov  2012 .
    drwxrwxr-x@ 3 root  admin   102B 23 Okt 22:58 ..
        com.apple.backupdelta.MoveChecked      3B 
        com.apple.s stem.Security     68B 


Strange thing here is, if you look from the outer folder there are no ACL for the folder. But if you look from the inside there are.

How can that be and how I can get rid of it?
The CrashPlan.app does not have an ACL. The output of ls is consistent, you must have misread it.


When you run ls -a in the parent directory, it tells you that . (i.e. the parent of CrashPlan.app) has extended attributes, and that CrashPlan.app has no ACL (mode string rwxrwxr-x).
When you run ls -a inside CrashPlan.app, it tells you that . (i.e. the CrashPlan.app directory) has no ACL (mode string rwxrwxr-x), and that .. (i.e. the parent directory) has extended attributes.


The parent directory does not have an ACL, but it has extended attributes com.apple.backupdelta.MoveChecked and com.apple.s stem.Security. This second attribute is odd: it should be com.apple.system.Security. This is a sign that your filesystem may be corrupted.