trying to update the 920xt with the 9.7 download on MacBook running high sierra .
Have updated the garmin express many times.
synched the 920xt successfully
restarted the computer many times
recharged the 920xt
let the 920xt drain and then recharged
turned off/on 920xt
disconnected 920xt
reconnected
70gb free space
deleted old 9.7 download folder
tried and tried.
just gets stuck at 67.4% with zero kb
had no problem updating the 810 2 minutes earlier.
please advise