Starting up HA on macbook pro

It might be old, but 4gb is more then enough.
Since you already established it can run Linux, i don’t see reason it wouldn’t work…
Most likely, your ‘old’ macbook will outrun any raspberry :thinking:

The only issue you might have is with drivers…
So if HAos doesn’t work, try debian 11 with supervisor ( which comes pretty close to HAos😉)