I'm experimenting with SDR on MacOS High Sierra. Trying both CubeSDR and GQRX and experiencing similar issues with both. The applications seem to work, but the audio is choppy and chipmunk-like. Obviously a problem with buffering and sample-rate conversion. Both apps use SoapySDR.
I'm currently using a HackRF device, but will test with a stock RTL-SDR device and try and isolate the problem further.
If anyone has any ideas as to how to resolve this, I would be grateful.
update: the chipmunking has been solved by rolling back the HackRF firmware to API version 1.02 from API version 1.03. Audio is still choppy after a few seconds though. suspecting a hackrf library issue.