You may know that recent Xojo versions stopped building for macOS from Windows and Linux. Mainly because Apple's tools to link executables and do code signing are not available for other platforms. See Why building apps for macOS requires a Mac on the Xojo blog or Xojo and cross compiling for macOS in Norman's blog. There is not much to gain with installing macOS only plugins on Windows or Linux to develop in Xojo IDE.

These plugins are cross platform. You can install them everywhere and use them:

• MBS Xojo Audio Plugin
• MBS Xojo Barcode Plugin
• MBS Xojo Cameras Plugin
• MBS Xojo ChartDirector Plugin
• MBS Xojo Compression Plugin
• MBS Xojo ComputerControl Plugin
• MBS Xojo CURL Plugin
• MBS Xojo DataTypes Plugin
• MBS Xojo Dongle Plugin
• MBS Xojo DynaPDF Plugin
• MBS Xojo Encryption Plugin
• MBS Xojo FMAPI Plugin
• MBS Xojo GraphicsMagick Plugin
• MBS Xojo Images Plugin
• MBS Xojo Java Plugin
• MBS Xojo Linux Plugin
• MBS Xojo Main Plugin
• MBS Xojo Network Plugin
• MBS Xojo Overlay Plugin
• MBS Xojo Picture Plugin
• MBS Xojo SQL Plugin
• MBS Xojo Tools Plugin
• MBS Xojo USB Plugin
• MBS Xojo Util Plugin
• MBS Xojo VLC Plugin
• MBS Xojo Win Plugin
• MBS Xojo WinFrameworks Plugin
• MBS Xojo XL Plugin
• MBS Xojo XMP Plugin

For Bluetooth, the plugin has both macOS and Windows classes, so you may need to install MacBase for the Mac side, even if you only use Windows classes:

• MBS Xojo Bluetooth Plugin
• MBS Xojo MacBase Plugin

And these plugins are macOS only, so you don't need to install them on Windows or Linux for the Xojo IDE:

• MBS Xojo AVFoundation Plugin
• MBS Xojo Mac64bit Plugin
• MBS Xojo MacCF Plugin
• MBS Xojo MacCG Plugin
• MBS Xojo MacCI Plugin
• MBS Xojo MacClassic Plugin
• MBS Xojo MacCloud Plugin
• MBS Xojo MacCocoa Plugin
• MBS Xojo MacControls Plugin
• MBS Xojo MacExtras Plugin
• MBS Xojo MacFrameworks Plugin
• MBS Xojo MacOSX Plugin

By only installing the plugins you need, the startup and pre-compilation times in Xojo will be faster. Please mind the dependencies.