I used Dan Frakes excellent article over at MacWorld. If you scroll down he gives you step by step instructions for both Disk Utility & Carbon Copy Cloner but as I mentioned previously I couldn't get the Disk Utility route to work, even after ensuring I had the steps correct by referring to his guide.
The CCC route worked first time.
My 10.8.2 USB thumbdrive boots and works fine on a 2011 MBP, but try as I may, I can't get it to work on my 2012 rMBP, I keep getting the grey screen with the circle and slash. I think I'll just wipe the SSD clean and do an Internet Recovery. I've wasted enough time already.
hi guys, i recently fitted a new hdd and installed mt. lion via mem card, all was fine till i transferd the hdd back to my macbook when i got the corcle with the line through it, tried the recover partition, tried isb boot but still get the line, please help, thanks
I found a solution to my problem above. Instead of making the bootable USB myself, I downloaded the application from Apple's website to try that instead:
I also changed the USB drive I used to a different one, so it is entirely possible that the USB was to blame. However, if anyone still has the circle with a line through it, I would try using Apple's application instead of manually making the USB or using Lion Diskmaker.
RE: djcotter1 - Dec 28, 2012 03:41 PM
You mention you formatted a HD in one machine, took it out and replaced in another machine...?
If the host machine was newer than the donor machine then thats your answer.
Some OLDER machines will not take the NEWER operating system / firmware !
The 'circle with the slash' through it means.......the operating system / firmware you are trying to install is NOT the correct firmware / operating system state at the correct level !
Example....my MBP 17" i7 2011 will ONLY let me install the minimum operating system it was shipped with.....MAC OS X 10.6.6
I tried constantly to install MAC OS X 10.6 .......wouldn't have it..
Anything lower and I'd get the 'circle with slash' through it !
Check the SPEC of your machine to see what it was shipped with originally