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Today, Apple has provided the first seed of the upcoming OS X Mavericks 10.9.1 to registered developers. We previously reported that Apple had seeded the 10.9.1 update to its employees along with a future 10.9.2 release. It’s currently unclear when those operating systems will reach the Macs of customers. Apple asks developers to focus on Mail, Graphics Drivers, and VoiceOver in their testing. Apple previously seeded an update to customers to fix Mavericks Mail problems. The 10.9.1 seed is labeled as build 13B27.