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Still beta build-numbering-scheme with four digit buildnumber and a letter at the end.

GM would be build 17F65.
That has nothing to do with a build not being the final release (there are no GM for point releases btw).

The last beta is usually the final release and they just drop the extra letters from the build string.
That being said, you usually get a full build download for final releases so there‘s probably beta 5.
 
Still beta build-numbering-scheme with four digit buildnumber and a letter at the end.

GM would be build 17F65.

Look at the quote below:
That has nothing to do with a build not being the final release (there are no GM for point releases btw).

The last beta is usually the final release and they just drop the extra letters from the build string.
That being said, you usually get a full build download for final releases so there‘s probably beta 5.

Yes, I didn't think about the full download. Not sure if it is always the case, but beta 5 is possible as well.
 
I would think another beta before final as macos just dropped beta 4 and its a C build so next week would be final beta then release i think
 
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