Return OS name as macOS, not Mac OS X

### Environment SaaS (https://sentry.io/) ### Steps to Reproduce 1. Generate an error from a Mac 2. See the error details ### Expected Result OS is reported as `macOS` ### Actual Result <img width="462" alt="Screenshot of Safari (19-06-23, 8-54-44 AM)" src="https://github.com/getsentry/sentry/assets/811954/7d1d4238-7a9e-4a57-a4d5-b2d2529fedbb"> ### Product Area Issues ### Link _No response_ ### DSN _No response_ ### Version _No response_ ```[tasklist] ### Tasks ```