Using  UDK2018   We can compile Clover with UDK2018 and not bother about EDK2 beta updates. Step by step from clear. 1. Install macOS. Preferably 10.13.x at this moment 2. Install Xcode. I am using Xcode 9.3.1 now. Install Command Line Tools. Xcode 10.1 in 10.13.6 is better. 3. Download NASM https://www.nasm.us/pub/nasm/releasebuilds/2.13.03/macosx/nasm-2.13.03-macosx.zip, unpack  and copy to     /opt/local/bin The folder may be invisible then sudo chflags
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