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having trouble downgrading OS X

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Andrew Wilson
having trouble downgrading OS X
on Jan 23, 2012 at 9:08:26 pm

I just got a used MacBook Pro (early 2011, 17" i7) It came with a new install of 10.7 but no OS discs.

I have a retail DVD of 10.6.3 and I'm trying to downgrade the laptop to 10.6. (needs to match an office machine of mine)

The DVD will mount but the installer won't run. If I change my startup disk in system settings, on reboot, I get an apple logo on gray screen - nothing else. Same if I hold down C while booting the machine.

I don't have a FW800 to FW400 cable so I can't try a target mode install but I can get the cable if that will do it.

Thanks.


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mahboob ekp
Re: having trouble downgrading OS X
on Jan 24, 2012 at 5:58:06 pm

I guess the DVD which you are trying to install is not specific for MACBOOK pro. The label on the DVD must have some info.


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Andrew Wilson
Re: having trouble downgrading OS X
on Jan 24, 2012 at 6:17:53 pm

Got it figured out. According to everymac.com, this MBP shipped with 10.6.6.

My retail DVD was 10.6.3

I was able to get a disk image of a clean install of 10.6.8 and used it in recovery mode to install over the old drive.

Works great. No Lion. yay!

Andrew Wilson
WestView Digital Video & Design
http://www.westviewdigital.com


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