Mac Pro Early 2009

joneyboy2000

Honorable
Apr 1, 2012
4
0
10,520
Hello, I have a mac pro early 2009. The original gpu died, but i had a spare nvidia geforce gt 430 laying aound, but it's not an apple gpu so there is no boot screen. I have os x el capitan running on it. I tried to install windows 7 with boot camp, but i get the error "no bootable device insert boot disk and press any key". How do i get back to mac os x? Thank you for your help.
 

joneyboy2000

Honorable
Apr 1, 2012
4
0
10,520
I have heard that i have to have an apple compatible gpu to reinstall os x. Is this true? The gpu i have in it is for pc.