Apple on Thursday seeded the second beta of OS X Yosemite 10.10.5 to developers. The software, labeled build 14F19a, is available to all registered Mac developers in the Updates section of the Mac App Store, or as a standalone download from Apple's dev portal.
Beta 2 of 10.10.5 comes two weeks after the first developer beta, and just a month after 10.10.4 was released to the public. It also comes on the same day as beta 2 of iOS 8.4.1, suggesting that Apple is looking to shore up its two OSes before their major fall updates.