Q: can you use the power supply from a 2010 Mac Book Pro on the 2013 Mac Book Pro

if your 2013 doesn't have the new Magsafe 2 then yes - otherwise you have to buy the magsafe to magsafe 2 adapter.

http://www.engadget.com/2012/06/11/apple-magsafe-vs-magsafe-2-photos-incompatibl e-power-connectors/

Yes, if it has the same power rating - 85 watts for the 15" models. The 13" models may now also be using 85 watt adaptors.

If they are the same wattage. If the 2010 had a 85 watt then you can use it for for the 2013, you can not use a smaller wattage adapter than what was originally supplied for the the computer. Check the adapter for the rating.

You can not use a 60 watt adapter for a MBP that requires a 85 watt, etc.

http://support.apple.com/kb/HT2346

Hope this helps