Stalkers like Gold, Express, IPguys, Voodoo and TVzon are strictly mac only. Epicstreams, Beast, OK2 and OK3 you can choose between mac or m3u. You can’t switch it once the line is made. If you provide mac then its a mac line. Vaderstreams allows both Mac and M3u.
Mac address is not your wifi or ethernet mac. If you have a settop box like Mag, Buzz, Z7+ then mac is written underneath the box and always starts with 00:1A:79
If your using a firestick or android box then you need to side load stb emulator and provide us the virtual mac. 1 Mac is tied to 1 device.