Lag

[macfacts]

My setup: 2013 mba with 2 external monitors (one using dp->hdmi adaptor and one using a usb3.0->dvi).

After upgrading to Mavericks, the monitor hooked up to the usb3.0 connection is noticeably laggier. Mouse cursor movement jumps around. arggg. Just FYI for you guys.

 

[macfacts]

http://arstechnica.com/information-...-multi-monitor-setups-with-some-usb-displays/

Here is a link with more info. So if you have a multi monitor environment with a usb displaylink device, don't update.