Warning: The macOS 12 SDK does not appear to be installed. Ports may not build correctly.

[Joshua Root]

On 2021-10-31 10:04 , Daniel J. Luke wrote:
> On Oct 30, 2021, at 5:25 PM, Nils Breunese <nils at breun.nl> wrote:
>> But I indeed don’t seem to have an SDK for macOS 12:
>>
>> So far I haven’t had any ports not building correctly. Is this a known issue? Does it have a known solution?
> 
> Yes - you can fix it by re-installing the command line tools:
> 
> https://trac.macports.org/wiki/ProblemHotlist#reinstall-clt
> 
> (this happened to me on upgrade to macOS 12 as well).
> 

I'd encourage everyone affected by this issue to use Feedback Assistant 
to let Apple know that you would like it fixed.

- Josh