What system and GPU is it? I'm guessing Mac Pro 3,1 with Radeon HD 5xxx or later. If this is the case, use the Patch Updater tool to re-install the AMD Video Card Patch.
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What system and GPU is it? I'm guessing Mac Pro 3,1 with Radeon HD 5xxx or later. If this is the case, use the Patch Updater tool to re-install the AMD Video Card Patch.