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Dec 25, 2014 12:42 PM in response to Tduttonby Loner T,On a preUEFI Mac, using EFI boot will cause Graphics and Audio issues at a minimum. You will need to use a MBR method for it to work properly. On a dual GPU MBP, CSM-BIOS does not expose the Intel integrated GPU to Windows (because Windows has no drivers for switching between the two GPUs), but as you can tell, EFI Boot does not know that, hence your issue.
From BC info.plist...
<key>PreUEFIModels</key>
<array>
<string>MacBook7</string>
<string>MacBookAir5</string>
<string>MacBookPro10</string>
<string>MacPro5</string>
<string>Macmini6</string>
<string>iMac13</string>
</array>
Reference - How to identify MacBook Pro models - Apple Support
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Dec 25, 2014 12:41 PM in response to Loner Tby Tdutton,excellent. Okay, so the reason I used EFI boot was because I got the message 'this mac can only run windows 7' or something, and I want to run windows 8.1. However, I have litterally just read a post about just installing windows 8.1 anyway through bootcamp from DVD and just downloading the latest support software 5.1.5621 and install that in windows, i'm assuming this should work?
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Dec 25, 2014 12:45 PM in response to Tduttonby Loner T,From BC info.plist, Win7Only models are
<key>Win7OnlyModels</key> <array> <string>MacBook7,1</string> <string>MacBookAir3,2</string> <string>MacBookPro5,5</string> <string>MacPro2,1</string> <string>Macmini4,1</string> <string>iMac10,1</string> </array> Yes, W8.1 should work in MBR mode (not EFI mode).
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Dec 25, 2014 12:55 PM in response to Loner Tby Tdutton,cool, i'll give it a try and fingers crossed. thanks for the help!
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Dec 25, 2014 4:13 PM in response to Tduttonby GoldSpell,I have a problem. I need GPT for Windows 8. I have formatted my USB Flash Drive in GUID-Partition..., but when I install the .iso on Boot Camp-Assistent the partition table switch to Master Boot Record. Do you have solution for that?