Is there a way when opening the "community layouts" in the software, to sort or filter the layouts?
It seems there are so many that are appealing but unfortunately in metric or using a track library where the vendor is overseas.
I like to stick to the Atlas brand which is available in many locations throughout the USA. Trying to find layouts that use that brand of track (outside of designing one by scratch), gets a little frustrating.
Couple of ways, actually! Layouts are also unit agnostic: When you're using imperial units on your Mac all measurements are displayed accord to the unit system selected in the apps preferences (General > Unit of Measurement).
The presets on the left can be used to quickly filter by model scale, e.g. to show only layouts for N scale:
In addition tags classify each layout by manufacturer and/or track system used.
The details view for any layout lists the tags for a layout and you can e.g. simply click on any tag to filter for all layouts containing the same tag.
You can also just go ahead and enter one or multiple tags in the search bar at the top to filter layouts:
Finally the sort control allows to e.g. order the list of layouts by area in case you're looking for either large or small layout designs:
Hope this helps,