Working second-hand MacBooks scrapped due to activation block Apple MacBooks manufactured as recently as 2020 are being scrapped by recyclers due to the company's Activation Lock feature, Vice reports. The Activation Lock makes it impossible to log in and factory reset second-hand T2 MacBooks...
I once connected a powered usb accessory for serial port devices to my USB-C (not M1, Intel Mac) and the Mac said it is disabling the port due to a potential overvoltage from the device.
The catch was - it did NOT work for 4 reboots and 4 days. I was about to take it in for repairs and suddenly it just resumed working and has been perfect ever since. Its like it needed time to recover.