A3.4 firmware upgrade issues on Mac

Following the tutorial, I get an error from the avrdude command, saying it can’t find the device:

$ avrdude -p atmega328p -c usbasp
avrdude: error: could not find USB device with vid=0x16c0 pid=0x5dc vendor='www.fischl.de' product='USBasp'

 
But the red LED is lit on the Model A, and the USBasp is correctly listed under my USB 2.0 hub (ioreg -p IOUSB):

+-o USB 2.0 Hub@14370000  <class AppleUSBDevice, id 0x100000534, registered, matched, active, busy 0 (171 ms), retain 12>
| +-o USBasp@14372000  <class AppleUSBDevice, id 0x100020941, registered, matched, active, busy 0 (1 ms), retain 9>

 
Also under System Information (system_profiler SPUSBDataType):

USBasp:

  Product ID: 0x05dc
  Vendor ID: 0x16c0
  Version: 1.02
  Speed: Up to 1.5 Mb/sec
  Manufacturer: www.fischl.de
  Location ID: 0x14372000 / 29
  Current Available (mA): 500
  Extra Operating Current (mA): 0

 
So what could be the issue? I’ve searched for an hour now and can’t find anything. Only some advice on using a USB 2.0 hub and to keep reconnecting, which I’ve tried. I’ve also tried -c usbasp-clone which made no difference.

The USBasp is a newer model from Betemcu, with a handy 5v-3.3v switch that I’ve set to 3.3v:
https://www.aliexpress.com/item/577097498.html

Any help would be greatly appreciated.