I have an old iMac (2008) with which I'm having serious problems.
Long story short, I installed Ubuntu on the iMac, and in doing so apparently deleted all partitions on the HDD. It also wiped rEFInd, which I previously had installed to dual boot OS X and Win7.
NO keyboard shortcuts work on the Mac during boot. I have tried two different keyboards (both windows keyboards, one wired one wireless), and every keyboard combo on the internet. Not even holding "Alt" (option) works.
I am wondering if I somehow overwrote the Mac bootloader/BIOS, and whether that matters. There is no longer an Apple logo on boot, though I do hear a chime. I have tried resetting the NVRAM and SMC. Again, the keyboard combo for NVRAM doesn't seem to do anything. I don't know whether this is the keyboard, or if it could be some bootloader issue.
Is it possible to reset the Mac to default "bootloader" without using any keyboard combos or being able to boot into OSX? I am unable to get my OS X install disk picked up by the bootloader.
Any ideas or thoughts would be appreciated. At my wits end!
