is there a firmware update for Mac? if so, can you post a link please?

MP3 players Sansa Clip | Clip+
2

There is no specific firmware version for the Mac.

Note the instructions in the Clip+ Firmware Post:

Mac  and  Linux  users can connect their Clip+ in MSC mode and follow the instructions below. 

MSC mode instructions:

  • Turn on the Clip+
  • Navigate to “Settings” on the menu of the device itself 
  • Next select “System Settings”
  • Next, navigate to “USB Mode” and select “MSC”