I installed it with the terminal in the user folder, then moved it manually in the system folder, relanched the finder, restarted the computer, it still does not work.
I tried that command and there was no such file.
xattr -d com.apple.quarantine /System/Library/QuickLook/WebpQuickLook.qlgenerator
I installed it with the terminal in the user folder, then moved it manually in the system folder, relanched the finder, restarted the computer, it still does not work. I tried that command and there was no such file. xattr -d com.apple.quarantine /System/Library/QuickLook/WebpQuickLook.qlgenerator