Unable to run Fennec scheme in simulator on M2 laptop

[mleers]

Hi,

I am new to the community and hoping to contribute. I am currently running into issues running Fennec on the simulator after successfully building in Xcode (14.1) on a 2022 M2 MacBook Air.

After building, the simulator pops up and tries to launch Fennec but fails with the following error:

Details

Application launch for 'org.mozilla.ios.Fennec' did not return a valid pid nor a launch error.
Domain: NSPOSIXErrorDomain
Code: 3
Failure Reason: No such process

After following the Readme (including building user scripts, resetting and resolving packages, again on a fresh download) I have tried the following in some combination:

• Replaced Team under Signing & Capabilities with my own personal team for all Targets
• Replaced DEVELOPMENT_TEAM in Common.xcconfig with my own team id
• Cleaning project
• Restarting simulator and making sure simulator isn't running before Xcode
• ctrl-f the mozilla team code (43AQ936H96) in another code editor and replace with my own elsewhere in the project like this thread suggests
• Excluded architecture for Fennec set to arm64 (default setting)

I have a hunch that it is related to architecture - has anyone that uses Apple silicon run into this before?

Thanks

[lmarceau]

Hi @mleers, we have some devs over here running on M1 and recently have a dev that started building with an M2 with success. @nbhasin2 did you ran into any of the issues listed up here? In case you can add onto the thread to debug this. Thanks!

[nbhasin2]

There should be no issues on M1 or M2 mac with XCode 14.1 as I run on a M2 mac
The XCode 14.2 has the black screen issue for WKWebview but since you are on 14.1 that isn't a problem.

[mleers]

@lmarceau @nbhasin2 I found the fix here. Essentially, Xcode needs to be launched using Rosetta (and installed first if needed like in my case).