I have got an older macbook pro that I use for basic things, but think it may struggle with video editing as its only a 2.26Ghz Intel Core 2 Duo, 8gb 1333Mhz DDR3 Ram and a 120gb SSD.
My main PC has the Nvidea Geforce capture software which seems to work pretty well, so I could record some footage and give it a try.
How long did it take you to get your head around the software and start getting acceptable videos?