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Macbook Pro Freezes on boot after installing Yosemite

Jun 20, 2014 1:02PM PDT

I installed OS X Yosemite today on to an external hard drive and once it was done, I booted from the hard drive to test it out on my 2009 Macbook Pro. It worked fine, but there were some glitches, it being a beta and all, so, I shut it down to boot it back up to Mavericks. When I tried to boot it up I got the Yosemite loading bar instead of the Mavericks spinning "flower" (i guess?). The loading bar goes halfway, then gets stuck and nothing happens. When I go to the Startup Manger instead of saying Macintosh HD (the normal booting drive) it says OS X Installer. My recovery partition is there as well. What happened?!?! How can I boot back into Mavericks?

Thank you kindly,
Graeme

Discussion is locked

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SOLVED
Jun 20, 2014 1:53PM PDT

I just booted on to the OS X Installer for the 5th time and it actually booted all the way into the installer and from there I could restart back in to my main hard drive. Mavericks is working again!

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Next time, before you shut down,
Aug 4, 2014 8:43AM PDT

take a trip to System Prefernces > Startup Disk and make sure it is set to the MBP's internal drive.

Should eliminate that problem

P

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Yosemite
Aug 4, 2014 4:35AM PDT

Good luck with Yosemite. I installed it on my MacBookPro and it ran for about 15 minutes then just froze up and i was never able to boot back up any farther than the login screen... Had to go back to Maverick which then ran for about 30 minutes and froze up... Anyway am no back to 107.5 and it seems to be working just fine...

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I have the same problem, how do I fix it???
Aug 25, 2014 12:21PM PDT

I have installed the Yosemite into my MacBook Pro, and it has been running ok until now after 3-4 weeks I downloaded it. Today it was working fine but then my screen froze and the spinning flower appeared without letting me click on anything on the screen. I tried to fix it shutting it down right from the power button but As soon as I put in my password, it freezes again with the same spinning thing going on for ever until I have to shut it down another time without any success. What the hell is voing on, or what should I do to get this fixed as soon as I can?