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MacbookAir4,2 intermittent freezing/crashing. Lion re-install left system unusable

1724 Views 3 Replies Latest reply: Dec 1, 2011 9:04 AM by david_dolphin RSS
david_dolphin Calculating status...
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Nov 15, 2011 2:10 PM

This post is mainly to catalog my experiences with my Mid-2011 Macbook Air. At this stage it's looking like I cannot solve the problems I'm having.


Within the first week of purchasing the laptop the system started freezing intermittently. I the symptoms seem to match those discussed elsewhere on this forum (1, 2, 3). At the worst times the machine would freeze 4-5 times a day, but it could also go 3-4 weeks without any issues.


I called Apple support who told me to Reset the PRAM/NVRAM and the SMC. This did not solve the issue. I re-installed Lion (without formatting the HD), no change. I performed the Hardware test (standard and extended), it showed a clean bill of health. I upgraded to 10.7.1 and 10.7.2 without any fixes.


I have just tried to reinstall Lion after a format of the HD and appear to have put the laptop in an unserviceable state. After formatting the drive I tried to ensure I could choose it as a startup disk. It wasn't showing in the Recovery Mode Startup disk selector tool. So I bless'd the mount, it wouldn't set the NVRAM boot parameter. bless'd the device, same thing. I went ahead with a re-install, and it downloaded the image and restarted.


Now I have a    prohibition symbol showing when the Mac starts. If I try to use the Recovery tool (Command-R) it asks for my wireless password, and won't accept the WPA2 key (I've tried multiple times, and can access the WiFi from my Android phone, it's the right key). Trying to reset the PRAM/NVRAM, SMC and entering the Hardware test are now all failing. The recovery USB key I made shows a flashing folder with a question mark when I hold option and select it. I remade the recovery USB key on a MacBook Pro and that's showing the same thing (though Apple do say:

If the computer shipped with Lion, the external recovery drive can only be used with the system that created it.

It's got 3 year Apple care, so it will be brought to an Authorized Reseller in Dublin tomorrow who does Apple Care repairs, there are no Apple stores in Ireland.


I'm disapointed that Apple are still beta testing their products on users.



Addational information:

Model: A1369 EMC 2469 - MC965LL/A

MacBook Air, Mac OS X (10.7.2)


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