For what it’s worth, here’s something lifted from a Garmin webpage:
Transferring GPX Files From Your Computer
Apple computers may require additional third-party software, such as Android File Transfer, to read and write files on this device.
If you have already created routes that you want to use on your device, you can transfer GPX files directly from your computer.
Connect the device to your computer (Connecting the Device to Your Computer).
The device appears as a portable device.
On your computer, open the file browser.
Select a GPX file.
Select Edit > Copy.
Browse to the GPX folder on the device.
Select Edit > Paste.
It seems that thinking in terms of MTP in relation to Apple is a bit pointless as that is a Microsoft protocol and the reference to Android Transfer Protocol (AFT) in the above suggests that the XT is Android based. For Garmin to go down such a route seems bizarre to me, and only bound to invite potential conflicts left, right and centre. Given that both Microsoft and Apple desktops and laptops are essentially ‘universal computers’, each capable of running Windows or macOS with relatively little fuss, to have adopted Android seems a major faux pas in terms of inter-operability. Google have even made a clusterwhatnot out of that between their own ChromeOS and Android! (I suspect short term ‘bottom line’ considerations on the part of bean counters have come into play all round, to the detriment of such worthless things as versatility, flexibility and creativity🥴.)
It appears quite possible to achieve mac/XT communication at drive level, but only via one application at a time? In which case, installing AFT and making sure any conflicting application or service is stopped before use might be the way to go here (with heavy emphasis on the stopping of those other apps & services)?
Out of curiosity, I have got myself looking at an issue that doesn’t affect me at all, and is very unlikely to (I probably need to get out more!) Personally, I think the dedicated sat nav has a rather limited future and my current Zūmo 390 will very likely be my last. Spend the money on tyres and petrol I say!
