Before macOS Big Sur, one could create an ad-hoc WiFi network using CWInterface's -startIBSSModeWithSSID: security: channel: password: error:
But this appears to no longer function on Big Sur:
The operation couldn’t be completed. (com.apple.coreWLAN.error error -3930.)
What is the Big Sur way of programmatically establishing an ad-hoc network?
Core WLAN is definitely the right API for this. The error you’re seeing, -3930, translates to kCWOperationNotPermittedErr. Originally I had assumed that this was controlled by the requireAdministratorForIBSSMode property, but I ran some tests and it’s not behaviour as I expected )-:
I’m going to need to dig into this in more detail, and I don’t have time to do that here on DevForums. Please open a DTS tech support incident and we can pick things up in that context.
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