Apple has posted the latest build (13F31) of the upcoming OS X Mavericks 10.9.5 release to the developer center. It’s also available for those on Mavericks running earlier betas. Apple again asks developers to focus their testing on Safari, USB, USB Smart Cards, Graphics, Thunderbolt, and Gatekeeper. With OS X 10.10 Yosemite hitting the streets in late October, it’s likely that 10.9.5 will be the last iteration of Mavericks.

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