How to install a specific version/build of Safari? A customer has reported a bug in Safari 10.1.1 (11603.2.5) which I cannot reproduce in Safari 10.1.1 (12603.2.4) on macOS Sierra.

Everything is updated in the App Store.


Is it possible to install a specific build number of Safari?
If not, what accounts for the different builds on different machines?
Are there release notes available at the level of build numbers?
I do not think you can find level of builds for Safari. As long as you are running the current latest version of Sierra, You will have the latest version of Safari.

To find the latest updated version and patch details you can track them on Apple Support.

The last updated for Safari came on 15 May 2017 - Safari 10.1.1

Supported OSes - OS X Yosemite 10.10.5, OS X El Capitan 10.11.6, and macOS Sierra 10.12.5