Problem updating since updating my laptop

[chas.s]

Hi All,
I have a Garmin DriveSmart 51 which I update using Garmin Express. However, I have just bought a new MacBook Pro which has the Sequoia 15.1.1 operating system. When I attempt to connect my Garmin to the new laptop I get the following: 'The disk you attached was not readable by this computer'. Garmin support are blaming Apple, but I can connect my Garmin Fenix watch without any problems. Can someone please help?
I will upload the warning screen I get. Thank you. Chas

 

[Nuvi-Nebie]

It could still be an Apple error, every item plugged into a computer's USB sockets has a different identity, so it is possible that the Fenix ID is handled correctly and the Drivesmart is handled incorrectly

 

[chas.s]

Has anybody else had problems connecting their Garmin satnav using the same Mac o/s? Or any suggestions on how to identify or resolve the problem. Thank you, Chas.