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Until a couple of months ago, I loved my triple-boot MacBook Pro (early 2011, 8,2 with high-resolution screen).
Then I tried to run the Mac OS X 10.10 (Yosemite) upgrade and everything fell apart.
I went to the Apple store, had them install Mac OS X 10.10 (Yosemite). I went home and repartitioned to install windows and everything fell apart.
I went back to the Apple store, had them install Mac OS X 10.6.8 (Snow Leopard) and also ordered a fresh Snow Leopard install disk (my original install disk was Leopard, IIRC).
Shrank the Mac OS X partition and installed Fedora (21) from DVD. Fedora came up, and now I cannot boot Mac OS X. Pretty sure that the Fedora install screwed up the EFI partition. It still boots fine into Linux, but trying to boot Mac OS X it fails to find the boot loader. If I inserted the Snow Leopard disk, I could boot Mac OS X from the hard drive.
I then tried to re-install Snow Leopard from the DVD, but the installer insists that the “Macintosh HD partition cannot be used for boot.” I booted into Linux and deleted the partition, thinking that the DVD’s installer would then offer me some partitioning options, but now I can't even do the initial boot from the DVD, I just get the three beeps when I try to hold down the option key at power on.
How can I wipe the drive clean enough that the Mac OS X installer on the DVD will allow me to do a fresh install?
And if I get back to that point, and install rEFInd and recreate my original setup, should I be looking at 32-bit or 64-bit versions of Windows and Linux?
Is there any hope at all that I could run Mac OS X 10.10 (Yosemite) on this system?