The current Rockbox Utility release has some problems, most importantly:
- it's missing the recently added players (xduoo, agptek)
- it hasn't been released for macOS, and the previous version has issues with https
I've created updated binaries (1.4.1 for macOS, targeting 10.7 and up, so no PPC support anymore; development binaries for Windows) for convenience. Feel free to try them.
https://drive.google.com/folderview?id=0B8pPsvGJ3RdKfnhyTDAwTWstMlhNR3NDanZURHFzOEI4ZHhoQUJ5OXUzN1NDRlp0U0hZNzQ(That folder contains various Rockbox Utility related stuff, if in doubt check the timestamps of the files)