I tried iPeng, but it does not work well.
Tried also squeeze player and squeeze lite via SourceForge and always get the error message „„Squeezelite“ ist beschädigt und kann nicht geöffnet werden. Es empfiehlt sich, das Image auszuwerfen.“ when trying to Install.
Unfortunately, we have no experience with Squeezelite instances running on Mac. We would recommend what you have already tried, namely to install an Squeezelite Player App on the Mac. Perhaps other users have had experience with this and can help you.