Mac Pro Boot Issue

I tried to install Bootcamp on a Mac Pro. It didn't end up working out. I had trouble booting in Windows and ended up pulling the second drive to get it to boot in OS X. It's been running fine since and I thought I changed the startup disk back to the OS X drive.

When I rebooted today I got a white screen that eventually turned into this attached screen that says there is no disk. This looks like Windows screen to me, rather than the apple ? Startup disk warning.

I'm not sure how to get back into OS X. I'm thinking this is software related rather than hardware. I believe the computer is still trying to boot into Windows.

OS X is on a 120gb Transend SSD drive. This is a Mac Pro 1,1 running 10.7 - not the one in my specs.

Thanks

I held down the option key and was able to select Mac OS. I'm just wondering why this happened?

Taz Mangus said:

Go into System Preferences->Startup Disk and make sure your boot hard drive is selected.

Click to expand...

Yeah, it was, which is why I'm bewildered. The problem has seemed to resolve thankfully.