Yes or Linux. Either that or change licensing so people can create Apple VMs and I can spin one up online. At the time I was looking at this problem (2012) the only viable solution was to buy a piece of Apple hardware and install it in the office and have the auto-build system call back into the office from the cloud to build the package as a particular step in the build.

So I have to worry about power, about the safety, about hardware, about updates, all because I can't use an arbitrary x86 processor to build an executable targeting an x86 processor. It made me so fucking cross.

Let us not forget that other platforms don't have this mandatory requirement.

They could make the signing APIs available to something like Jetbrains' AppCode. No porting necessary.