El Capitan Developer Preview/Public Beta Build Numbers

I haven't got a full list but hopefully this helps as a start:

Release 2 - 15B22c
Release 4 - 15A226f
Release 5 - 15A235d
Release 6 - 15A244d
Release 7 - 15A262e
GM - 15A282b
App store public - 15A284

Oddly, JAMF has this incorrectly stating it's the same as the GM.

See this page...

The "Third Party Products" pages are maintained by the JN Community.

I edited the page to remove the "Same as GM" flag.

Thanks @mark.buffington - I saw that but didn't want to assume it was OK for me to edit...

@milesleacy Can you do the opposite? If running 10.11 and the build is not 15A284 then prompt to upgrade.

@spraguga Good idea!

Although that would work for a time, 10.11.1 may or may not be released relatively soon.

For anyone not sure of what we're talking about, here's a screenshot of a Smart Computer Group containing all 10.11 macs that are not running today's release...

@milesleacy I guess you can make it more specific, If running OS is 10.11.0 and the build is not 15A284 then prompt to upgrade. The next release you can adjust the smart group to add the next build number with an OR.

There's no such thing as 10.11.0 (despite what a JSS might tell you), but your method is sound.

Heres another version - Release 8 15A282a