But you can't distribute whatever you build legally as far as im aware. The apple sdks prevent you from shipping legally.

The only way atm is installing homebrew and using a gnu tool chain if I understand the license of the official sdks correctly?

Tangible thing versus conceptual thing. License never stood a chance.

quickemu [1] is good at running macOS VMs.

1: https://github.com/quickemu-project/quickemu

My only experience with docker is headless in CI. I do have AMD. I'll have to look into this. Thanks

Emulating mac or using mac SDKs on non apple devices is against apple's bullshit license though.

BS needs to be countered with rejection.

Best way to reject it is to ignore macOS.

If Apple finds out they’ll ban your developer certificates and then all installed copies of your app will stop working.

Has this ever happened? Not revoking certificates, which they've certainly done for malware or e.g. iOS "signing services", but because a developer used non-Apple hardware.

I am the dev of Pocket Squadron (https://play.google.com/store/apps/details?id=com.bombsight....) and a few years ago I tried to make a build for iOS due to many player requests. I did not have a mac so I setup a mac VM and a dev account to start making builds and see how big of a lift it would be. My account was banned unfortunately. Still no iOS build to this day, I'm probably missing out on a good bit of money.

Could have just created a new account. As I said, BS needs to e dealt with rejection... rejection of their ban in this case.

I don’t know the answer to that but a quick search shows lots of examples of people complaining that their developer certificate has been revoked, demonstrating a willingness by Apple to revoke certificates if they believe the developer violated their terms of service. I doubt Apple would go out of their way to include language in the agreement that binds developers to their own sanctioned platform if they didn’t intend to enforce it.

I would wager all of those are distributing malware.

I would take that wager. I highly doubt Apple’s revocation team has a 0% false positive rate.

I agree, but I think a better wager (and what GP probably meant) would be that all of these developers had their certificates revoked because Apple thought they were distributing malware. That's what the system is for.