Thanks for responding. I do feel like it's a software issue, but I'm not sure exactly what the solution is. It always fails immediately at the beginning of the second step, which it says is updating the sub-boards, on
https://www.arturia.com/faq/matrixbrute/matrixbrute-general-questions .
Please note that unlike the description on the FAQ page and others in this forum, the LEDs are ON on my unit. The preset number, button A1 in the matrix, the sequencer tempo and buttons and the LFO LEDs are all on. The LFO 2 light is slowly pulsing, as it would if the unit were working. However, the unit is completely non-responsive.
I'm following the steps you listed in another post (and that are on the FAQ page):
-Turn off MatrixBrute
-Plug MatrixBrute USB into the computer
-Launch MIDI Control Center, select MatrixBrute as the device
-Turn on MatrixBrute while doing fast On/Off with the audio gate switch for a while
-After 5 seconds or so MIDI Control Center asks "Device is in Bootloader mode, please upgrade firmware"
-Either selected Device > Upgrade Firmware, or clicked the button next to Firmware Revision
-Select Upgrade (Not Download Latest)
-Selected the downloaded firmware file
-Clicked OK to start – it updates the Master Board
-Turned off the MB (also have tried unplugging it), waited a few seconds, turned it back on, waited several seconds, clicked OK
At this point it fails with the error message "There was an error during the burn process: Update failed."
I have opened the Audio MIDI Setup and MIDI Studio window, and deleted the MatrixBrute and another Updater device when they appeared (I think Updater is how the MB appears when in Bootloader mode), and then run the update process again, with the same results.
I emailed tech support about this, and they also suggested that I try running the update on a Windows machine, "As this issue is not faced on Windows, you should be able to do it without any further complications." However, I had exactly the same results attempting it on Windows.
I'm not using a USB hub, and nothing else is connected to my Mac via USB. I've tried other USB cables.
This covers about all the suggested solutions I've seen posted anywhere, but I'm hoping there are other ideas for something I'm not doing! =)