41CL and Mac Mojave - USB-to-serial device no longer in /dev

[smp]

I've been at this since yesterday... I've had a variety of problems, including batteries dying, timeouts, the calculator going to sleep unattended, and the computer going to sleep unattended. Sigh!

This morning, I performed a complete update (without using the CPONLY command) and the 41CL did the complete check (1h, 25m, 58s), and finished off indicating that NUT0-N, TIME-3A, and YFNZ-4F still need to be updated. BUT, when I did the * and FLUPD, the 41CL screen goes blank for a couple of seconds, and then beeps showing UPD DONE. BUT, no commands were ever sent over to the PC to download the files.

I'm stumped at this point. Any thoughts or suggestions would be appreciated.

TIA

smp