Thanks macjack and FatMac\>MacPro ,
After repaiing permissions in disc utility I couldn’t log in again, and couldn’t understand rebuilding ACL permissions as I had printed out your replies and had no access to my email to get the link.
After trying to install the update from the combo updater thing got even worse, next I did a reinstall from recovery, which spent six hour downloading then failed with no error. I did an erase of my partition and reinstall which then failed but gave me an error about encryption. So I erased the whole drive and reinstalled. This worked. I then ran the update again and it was broken the same as the first update!
After another erase and reinstall I decided not to update, so I stated the restore from time machine. After this completed it crashed with the error message saying I must power off and then on again. restarting didn’t help.
After another erase of the whole drive, and reinstall I did a partial restore from time machine and am running again.
However, I don’t want to attempt another upgrade to 10.7.5. Will Apple comeout with a statement about what went wrong? When will you fix this update?
In the mean time I suggest to any owners of MacBook Air to avoid this update.
For reference this is my model:
Model Name: MacBook Air
Model Identifier: MacBookAir4,1
Processor Name: Intel Core i5
Processor Speed: 1.6 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 4 GB
Boot ROM Version: MBA41.0077.B0F
SMC Version (system): 1.74f1
Cheers.