@cortado or maybe driver for MacOS needs update. Tried on my PC and could connect via the UART app :)

USB mode gone from Stick-C?? New "code" menu goes directly to Cloud mode. But in the cloud UI I cannot load blocklys from my computer. Is there a secret to enabling USB mode?

@world101 Thanx! After making new topics and setting them to QoS=0, and retain=0, it finally works with many MQTT subscriptions on both M5Stack and M5Stick-C! (1.4.4 and 1.4.5)

(PS! Just changing the old topics that had retain back to no retain, did not work, had to make new ones.)

@world101 Remember to remove the .dms file extension, which is wrongly added by Safari/MacOS. Then you should be able to execute the file by right-clicking and choosing "open in Terminal", then follow instructions.