For M1 mac users out there running on Big Sur with the CORE keygen (I think it might work with other keygens as well)
The command brew install upx won't going to work
Instead, use
brew install --build-from-source upx
in which will take the upx code and then build it from scratch
Copy the keygen to Desktop
Open terminal and write
sudo upx -d <path to the keygen>
Important note:
Dragging and drop the keygen app into the terminal with sudo upx -d WILL NOT WORK
Instead, the path to the keygen will have to be the entire path from
Keygen app -> Show Package Contents -> Contents -> MacOS -> The keygen name
And then drag that into
sudo upx -d
An example of a complete terminal line that you'll be executing will look like this:
sudo upx -d /Users/<your username>/Desktop/CORE\ Keygen.app/Contents/MacOS/CORE\ Keygen
This works for me, and I hope it will also for other people out there, despite it's a late reply
Vintage_Wander
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