Can't install Mac OS after installing Windows, Can't install Mac OS after installing Windows

I have dual-booted Windows 7 the last year on my Macbook Pro, but today when I started my computer, I just got the white screen. I tried holding down the startup keys(c to boot from CD, d to do hardware test, alt to see boot options, etc), but NOTHING works. When I held down d I could enter the hardware test once, but then I got the message "Apple hardware test does not support this machine". I've also been able to choose to boot from Mac CD a couple of times, but then I just see the Apple, and it never goes to where I can actually install it. What can I do to get back Mac OS on my machine?

The firmware restore cd doesn't start, boot or anything visible on the screen, it just loads it behind the scenes, does the flashy or beepy thing.
Reboot twice and see if the at boot key commands work again using the OS X install disk, option key or command r or command option r while booting. (you never mentioned what OS X version or machine your using)
It's possible a recent firmware update occurred (software update or AppStore) and bricked your EFI, the version you get from the website download is older because they don't release it there until it's been tested in the field like on people like you.
If a newer firmware is on the machine already and it's borked, the older one your using won't load, only newer versions are accepted by the hardware.
If this is the case, your only choice is to have the logicboard replaced, I hope you have AppleCare.
You also could have made a mistake and downloaded the wrong one, so it's refusing to apply it.
Need machine/operating system identification help?
Find the serial number, thus the model number and thus gives the operating system that originally came with the machine. However gives not what operating system version the boot drive was later upgraded to. Do not use older OS X verisons to repair newer verisons. It is possible to use the original operating system version installed on another boot drive to recover files from a later operating system non-booting drive.
https://support.apple.com/kb/HT1159#MacBook_Pro https://support.apple.com/kb/HT1349
https://support.apple.com/kb/HT1559 http://www.everymac.com/ultimate-mac-lookup/

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what OS originally came on your Mac.
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boot into the recovery partition (command R at restart)
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After i install windows 7 in bootcamp my mac turns off, but i can...

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I installed windows 7 with bootcamp and everytime y try to boot from windows it shuts down my mac. Th weird thing i that i installed parallels 6 in my mac and i can go inside my windows 7 partition.
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https://support.apple.com/kb/HT2213
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https://discussions.apple.com/message/16276201#16276201

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Clinton

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Can't install Mac OS after installing Windows, Can't install Mac OS after installing Windows

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