I can't get Plogue Bidule to see the vst3 file of X-Volver. It's in the correct location of /Library/Audio/Plug-Ins/VST3
I get macOS security warnings that it is malware and even in macOS 11.1 System Preferences -> Security & Privacy I press 'open anyway' but it does nothing.
I emailed the developer so hopefully there's a way to get it working
I found the following info and it worked well for me:
The problem with some audio plug-ins on a Mac is that Gatekeeper has become more aggressive and now also blocks VSTs. Gatekeeper is what keeps MacOS users from inadvertently launching unsigned apps downloaded from the internet. Just like in previous versions of MacOS you can make Gatekeeper allow downloaded applications by right-clicking them and then holding down shift and clicking open. This presents you with a new button named “open” that will permanently allow the application to run. Another way of doing the same thing is trying to launch an unsigned application, and when it fails go into System Preferences > Privacy & Security where the application is listed and you can “Allow anyway”.
The problem is, a VST is runnable code but it’s not an application. VSTs that come with installers normally work, but those that are just VSTs don’t. When you do a rescan of VST paths the blocked VSTs are listed in Privacy & Security but clicking “Allow anyway” does nothing. You can right-click and shift-open the VST outside of the DAW, which actually provides you with the third button labeled open, but that doesn’t help. You can go into the VST with is actually a directory, find the executable file and shift open that too – but that’s not the solution either.
After running the commands below you will be able to re-scan your VST paths and use your VSTs. What this does is that it clears file attributes that mark downloaded files as unsafe and put in quarantine – exactly the same as when you shift open an application and click the “open” button.
I’ve seen a lot of alternative solutions including permanently disabling Gatekeeper (not recommended!) or workarounds that have to be redone after every reboot.
To de-quarantine your plug-in folders copy and paste the following commands into a terminal window:
For VSTs enter:
sudo xattr -rd com.apple.quarantine /Library/Audio/Plug-Ins/VST/*
For VST3s enter:
sudo xattr -rd com.apple.quarantine /Library/Audio/Plug-Ins/VST3/*
For AUs enter:
sudo xattr -rd com.apple.quarantine /Library/Audio/Plug-Ins/Components/*
Probably a good idea to follow up with a reboot.