I purchased an iMac 27" from Apple in March. The serial number is D2*******NMP. I have an external bootable HD with Snow Leopard operating system on it. I started up my iMac holding the option key and selected the Snow Leopard disk image to boot.The computer begins the process but hangs on a gray screen with the apple logo. Can I use the snow leopard OS with this iMac?
What must I do to get it to operate?
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