RMX-500 firmware Mac
If the firmware version of your unit is Ver.1.08, you don't need to update the firmware.
Please read the manual to check the firmware version of your RMX-500 and how to update the firmware.
Unzip the downloaded file "RMX-500_v108_MAC64.zip". This file will appear: RMX-500_v108_MAC64.dmg
Notice to macOS Big Sur users
Important notice for updating firmware on macOS Big Sur