Installing Big Sur on the Dell Optiplex 7040 Micro

trs96 said:

Important Note: If you have been directed here from the original 4K OptiMac thread, this post will show you how to increase DVMT pre-allocation to 64MB. A requirement for powering a 4K/60Hz display via HD4600 graphics. The CFG unlock is not mandatory when using Mojave or Catalina. If you do plan to upgrade to Big Sur later on, you can also unlock CFG at this time. Then you'll be ready to install macOS 11 when the time comes.

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