MacOS default resource class changing to m4pro.medium on December 3, 2025

On December 3, 2025, the default resource class for macOS jobs will change from macos.m1.medium.gen1 to m4pro.medium.

What this means:

If you haven’t explicitly specified a resource class in your macOS job configuration:

• your jobs will automatically run on the faster m4pro.medium resource starting December 3rd
• note that m4pro.medium is priced at 200 credits/min compared to 150 credits/min for the previous default, though faster execution times may offset the higher per-minute rate - see our price list for details
• no action is required unless you want to opt in early or select a different resource class

If your jobs are explicitly configured with a specific resource class, they will continue to use those specifications.

Why we’re making this change:

The m4pro resource class offers significantly better performance, resulting in faster build times for most workloads.

What you can do:

• To start using m4pro.medium before December 3rd, update your configuration to explicitly specify the resource class
• To continue using macos.m1.medium.gen1 after December 3rd, you can explicitly specify it in your configuration - however, please note this resource class will reach end of life on February 16, 2025 (see deprecation notice)
• Review our macOS resource class documentation for all available optionsRetryClaude can make mistakes. Please double-check responses.