Not sure if it has been brought up before, but I’d like to see the Sansa be more mac compatible.
At least have a mac version of the firmware updater and converter.
I didn’t see this suggestion but if it has been brought up before, sorry about that. 
you can always manually update the firmware by downloading the firmware from this site and for the converter, if you are using the sansa view, you can use this setting using a video converter you prefer
Container (file extension) .Mp4
Resolution: 320x240
Frame Rate: 30FPS
Video: 384 or 512
Audio: 128/192kbps (up to you really)
Sample: 44100
if you are using the sansa fuze, you are lock with sansa media converter or rhapsody