dbbarron1

Q: imac 12,2 bricked after latest El Capitan update

Have a 2011 12,2 iMac 27"  Ran great until the latest El Capitan update (week or two ago).  After the update, it starts to boot and then fails to complete the boot - white screen - spinning indicator - Apple logo disappears.

 

I should note it has a Samsung 840 Pro SSD (latest firmware verified) as the boot drive, but everything I tried also failed using the original HDD.

 

I reset SMC and NVRAM, Reformatted the SSD, ran extended HW tests - all good.

I used Network Recovery to install Mountain Lion - works great.  Machine boots fine, runs applications, etc.

Once I apply the El Capitan install from the app store, it gets 70% through the install (bar progress) and then dies - won't boot - same issue as above.

 

Any thoughts?

Seems like a Kernal issue with the latest El Capitan version (I had been running El Capitan fine until this update).

 

db

iMac, OS X Mavericks (10.9.4)

Posted on Dec 10, 2015 4:57 AM

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