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fotuwe

macrumors member
Original poster
Dec 22, 2009
92
31
Hi there!

I was asked to help a friend out with upgrading his Mac (mainly because he bought a new rMBP13 with 10.10 running). So we want to keep both (iMac+rMBP) on the same OSX Version.

Right now the iMac is running with 10.5.x. So I created an 10.10 USB-Stick - surprisingly I am not allowed to install it on the iMac HDD? While booting with 10.5.x I am also not able to double-klick the installation file on the usb drive - problem with the architecture.

I tripple-checked that 10.10 is running on an iMac 8,1 (2GB Ram - this will be upgraded next to 4).

I am cloning the HDD now, the completely erase the iMac HDD and try a new clean install ... but somehow I think I will get the same problem?

Any suggestions?
 

fotuwe

macrumors member
Original poster
Dec 22, 2009
92
31
Solved: Upgrade to 10.6.8 - then update to 10.10.
I wasnt able to install it with a bootable 10.10 stick .. for whatever reason.

So: Always 10.6.8 ... then the next step
 
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