[pekk]

This is also a use case for not developing on OS X, which doesn't have anything to do with production anyway.

[mdaniel]

Can you clarify? Do you mean that one should only develop upon the platform that will be used in production?

[justizin]

Yes, the previous commenter is a purist with no battery life on their laptop.

Further, if you're in the middle of upgrading your production OS, does this mean that you need two developer machines?

C'mon!