It's because Safari doesn't understand the [unprefixed transform property](https://github.com/callemall/material-ui/blob/3e89576583f4f20b6f60ad09ec2df2df1470cd46/src/ripples/focus-ripple.jsx#L73). http://caniuse.com/#feat=transforms2d Actually, to tab between tabbable items in Safari, [one should press Option+Tab](http://stackoverflow.com/a/2292336).
It's because Safari doesn't understand the unprefixed transform property.
http://caniuse.com/#feat=transforms2d
Actually, to tab between tabbable items in Safari, one should press Option+Tab.