This month i restarted work on zxsp.
Since i migrated to Qt actually 4 years ago i have some work to equal the state of the "native" OSX version. But it's worth it. Qt is a much better API.
The current state of zxsp is, that models are supported as in 0.7.2, debugger is missing and save snapshot and save tape file is not yet done again. Audio-in is also mostly missing.