Apple today released the third developer beta of Safari 10 for OS X Yosemite and OS X El Capitan users, allowing those who don't yet want to install the macOS Sierra operating system to test out the upcoming Safari update. The third Safari 10 beta for Yosemite and El Capitan can be downloaded from the or over-the-air through the Software Update mechanism in the Mac App Store for those who installed the first two Safari 10 betas.
Safari Beta Download
As in previous betas, Safari 10 for Yosemite and El Capitan does not include all of the features that are available or will be available in macOS Sierra, like Apple Pay on the web and Picture in Picture support, but the Safari 10 functions listed below are available.