Can't finish flashing Proxmark3 Easy

Support
1

Almost two months ago I received Proxmark3 Easy from your and set it up on my Mac via a windows virtual machine. I went through all the make file and flashing and other things and it worked fine. Yesterday I noticed that you now have a webapp to uses so I tried that.

MacOS Tahoe 26.3 found the Proxmark3 and said I needed to update via flash to be compatible with with the webapp. The flashing started fin but it also stops at 67% flashing with error cmd 0x3. I tried 4 times or so with same error.

What is next?

2

Well I resolved by using the webapp on the Windows virtual machine and reflashing. The webapp now works on both the the Windows virtual machine and native Mac OS

1 Like
3

Have another question. I downloaded the MacOS zip file and installed the the Proxmark3 app. When I ren the app I get this:

║ Proxmark3 Client v4.21128 (Iceman) ║

╚══════════════════════════════════════════════╝

Device found: /dev/cu.usbmodemiceman1

[=] Session log /Users/las/.proxmark3/logs/log_20260330164442.txt

[+] Using UART port /dev/cu.usbmodemiceman1

[!] :warning: ERROR: invalid serial port /dev/cu.usbmodemiceman1

[?] Hint: Try the shell script ``./pm3 --list` to get a list of possible serial ports

Proxmark3 client exited with code 0

Press Enter to close…

4

hmm ok thanks. i will do more testing of firmware updates on macos.

to be honest I don’t use MacOS at all so I’ve not tested beyond the initial builds on my mac mini. I will do more deep dive testing this week and push updates.

1 Like
5

found chrome for macos bug with web serial buffer sizes causing firmware to die at 67%.. fixed.

updated the portable client app package to auto-find proxmark on any available ports. should work now.

3 Likes