Nano Matter flashing fails on Apple M4 (Arm64) processor with Arduino IDE 2.3.6

[GiGit-coder]

Hardware

Arduino Nano Matter

Core version

3.0.0

Arduino IDE version

2.3.6

Operating system

macOSX Sequoia 15.6.1

Radio stack variant

Matter

OpenThread Border Router device (if using Matter)

Apple TV

Issue description

Arduino Nano Matter upload fails because of missing driver when uploading on an Apple arm64 M4.
Same libraries (3.0.0) work fine on a INTEL based iMac
Here is the output:

`Open On-Chip Debugger v0.12.0-esp32-20250707 (2025-07-06-17:36)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
debug_level: 2
Warn : DEPRECATED: auto-selecting transport "swd". Use 'transport select swd' to suppress this message.
Error: flash driver 'efm32s2' not found

Failed uploading: uploading error: exit status 1`

Serial output

No response

RTT output (if using Matter)

No response

Minimal reproducer code

No response

[leonardocavagnis]

Hey!
Have you try to re-install the board package from the board manager?
Or to downgrade to previous core version?
I have your same macOS and i have no experience uploading issues.

[GiGit-coder]

Hey! Have you try to re-install the board package from the board manager? Or to downgrade to previous core version? I have your same macOS and i have no experience uploading issues.

Yes, many times. I have reinstalled IDE, board, libraries. The only result I got is to add the efm32s2 driver according to this link, recompiling everything on my M4 iMac. If you follow the discussion on this link it seems that the driver is working BUT I cannot get the Nano Matter erased. The previous sketch keeps on running without being replaced by the new one! This strange behavior does not happen on the INTEL Mac.

[per1234]

@GiGit-coder neglected to provide critical information in their issue report. The cause of the error is that they are not using the OpenOCD that is installed by Boards Manager. They replaced it with a different version. They did that due to not wanting to install Rosetta, as is required to use the x86/"Intel" build of the tool that is distributed by Arduino:

https://forum.arduino.cc/t/nano-matter-on-apple-silicon-machine-without-rosetta/1405361

[GiGit-coder]

Thank you for your update.
I was probably not clear enough in describing my problem (my fault, sorry!)
So let me reformulate it.
If I install the nano matter board from SiliconLabs (as far as I know it is the only one available for Arduino IDE) I got the openocd tool built for X86 machine and the only way to have it running is to install Rosetta on M4 arm 64.
Now the question for a possible definitive solution: since this board works without problems on an Apple INTEL machine, is there any plan-possibility to get an arm 64 executable from SiliconLabs? Is it a big problem for SiliconLabs to rebuild the same source code openocd on an Apple silicon environment?
Thanks again