Project Configuration across Windows/macOS

I have some issues with Project Configuration: we are trying to set up Project Configuration across users on both Windows & macOS. The library path/library folders & filters/alias path worked seemlessly for PC users, but for Mac users the library & alias paths are not showing up at all. The .sbsprj is saved in a shared location and it's at the root of both library and alias folder, so they show up like this in the .sbsprj:

<watchedpaths>
	<size>1</size>
	<_1 prefix="_">
		<url>$(PROJECT_DIR)://</url>
	</_1>
</watchedpaths>

<urlaliases>
	<size>1</size>
	<_1 prefix="_">
		<path>file:.</path>
		<name>Library</name>
	</_1>
</urlaliases>

How can I solve this issue for Mac users? It this a path compatibility issue between PC/Mac?