Look at this on eBay:
4 Ports USB 3.0 External HUB Adater for PC Laptop HDD MP3 Mouse Super Speed
http://bit.ly/TNDUji
I have a late 2012 Mac mini, I'm going to use it for
Keyboard
Mouse
USB speakers
And the extra port for plugging my iphone or ipad when I need to connect to computer
Or when connecting a USB flash drive real quick
The description says works on Mac
The cheapest powered 3.0 USB hub on amazon is $30
4 Ports USB 3.0 External HUB Adater for PC Laptop HDD MP3 Mouse Super Speed
http://bit.ly/TNDUji
I have a late 2012 Mac mini, I'm going to use it for
Keyboard
Mouse
USB speakers
And the extra port for plugging my iphone or ipad when I need to connect to computer
Or when connecting a USB flash drive real quick
The description says works on Mac
The cheapest powered 3.0 USB hub on amazon is $30