I've had a simple PR for a Mac issue sitting there for months, pinged dom (author) multiple times, no response. I think the dude has a problem with Araq or something and seems to have left the Nim community completely. Don't quote me on that.
Aside from the above Mac issue I've yet to run into a problem with choosenim though... but it's only a matter of time. I think choosenim should be merged into Nim's official repository like what a user suggested here: <https://github.com/dom96/choosenim/issues/337> A better alternative IMO is compiling from source.