SAM 2021.12.02 requires MacOS 10.15 or later.
Mac Installation Instructions
- Double-click the package (.pkg file) to run the installation program.
For some older versions of MacOS (OS X), a security feature called Gatekeeper may prevent you from starting SAM. For more on bypassing Gatekeeper, see this CNET article.
If SAM does not display correctly in macOS Dark Mode, close SAM, switch macOS to Light Mode, and then restart SAM.