I'm following this guide: hikingguy.com/.../
Using maps from this source, mentioned in the above guide: www.gmaptool.eu/.../usa-osm-topo-routable
The maps load in Basecamp correctly. Basecamp and MapInstall both recognize my Garmin device along with the 32Gb FAT formatted microSD card installed. MapInstall will prepare the maps in a timely manner, but once the process to transfer to the device begins it just adds another minute to the expected time for every minute that elapses. Leaving it overnight left me with a wait time of twelve hours. When I try to close out of the software at any point in this process, closing the app hangs. When I shut down my Macbook, the OS crashes, and when I start it back up I have a crashlog waiting for me to send to Apple (just a Darwin kernel backtrace, nothing actually helpful in this context).
MacOS Ventura 13.6.7, Intel processor and graphics. 16Gb memory.