Why would I choose an OS X plan (as opposed to a Linux Plan)?
If you develop for Apple-related software (e.g., you are an iOS developer), you will likely need an OS X plan to ensure your tests run on our secure, private cloud of OS X machines.
OS X plans start with a two-week trial with access to our Growth Plan (5x concurrent builds). At the end of your two-week trial, you may choose the plan that fits your needs best.
Linux plans allow customers to build on multiple isolated Linux systems. All customers get 1 free linux container and then Linux plans offer access to additional containers available at $50/container.