@bpteague Has an excellent update solution as of February 2025 using modern tools and an updated workflow.
This gist will remain here, but is deprecated. I'll keep it here historical and link-preservation purposes only. I strongly encourage everyone to check out the solution above!
- Create a developer account with Apple
- https://developer.apple.com and shell out $99 for a developer account
- Download and install X-Code from the Apple App Store