Disk permission errors not resolving

Start up in safe mode first to see if that resolves your problem.

If that doesn't work you might try startuping in Single-User mode, and then Force run the onboard Disk Utilty repair. (fsck -fy ) Here's how:

2. At the command-line prompt type:

/sbin/fsck -fy

3. Press Return. fsck will go through five "phases" and then return information about your disk's use and fragmentation. Once it finishes, it'll display this message if no issue is found:

• The volume (name_of_volume) appears to be OK

If fsck found issues and has altered, repaired, or fixed anything, it will display this message:

• FILE SYSTEM WAS MODIFIED *****

Important: If this message appears, repeat the fsck command you typed in step 2 until fsck tells you that your volume appears to be OK (first-pass repairs may uncover additional issues, so this is a normal thing to do).

4. When fsck reports that your volume is OK, type reboot at the prompt and then press Return.

Your computer should start up normally and allow you to log in.

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