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SaaS runners on macOS are in [Beta](../../../policy/alpha-beta-support.md#beta-features) for approved open source programs and customers in Premium and Ultimate plans.
CI/CD minutes used on GitLab SaaS macOS runners are included in your CI/CD minute consumption totals. CI jobs that run on macOS **will** consume CI minutes at a faster rate than CI jobs on the GitLab SaaS runners on Linux.
Refer to the CI/CD minutes [cost factor](../../../ci/pipelines/cicd_minutes.md#cost-factor) for the cost factor applied to the GitLab SaaS macOS runners.
To start using SaaS runners on macOS, you must be an active GitLab SaaS Premium or Ultimate customer. Participants in the GitLab Open Source program are also eligible to use the service.
### Configuring your pipeline
To start using the SaaS runners on macOS to run your CI jobs, you must configure your `.gitlab-ci.yml` file:
You can specify a different Xcode image to run a job. To do so, replace the value for the `image` keyword with the value of the [virtual machine image name](macos/environment.md#vm-images) from the list of available images.
## SaaS runners on macOS service level objective
In SaaS runners on macOS, the objective is to make 90% of CI jobs start executing in 120 seconds or less. The error rate should be less than 0.5%.
## Known Limitations and Usage Constraints
- If the VM image does not include the specific software version you need for your job, then the job execution time will increase as the required software needs to be fetched and installed.
- At this time, it is not possible to bring your own OS image.