Hello guys,
You need to make sudo upx -d procedure not directly to xf-adsk20 file. You should right click the file first, then show the content
Contents- MacOs-x-force
Now sudo upx -d (file location of x-force) simply select the file and move it to terminal. You will see it will be unpacked and start working.
However, with BigSur, I am having "Not admin, wrong version or customer error" Error. Although I given the permission by "sudo spctl --master-disable" , it is still giving error. Do you have any ideas how to solve out this?