Does anyone use gimp software for editing with their mac? Curious to know if it is like photoshop or is it best to just get photoshop?
GIMP is the best free open source image editing application you can find. It is an image editor and raster graphics editor at the same time and offers nearly everything Photoshop has to offer: image retouching and editing, free-form drawing, resizing, cropping, photo-montages, layers, converting between different image formats. If you want a very versatile tool for free, go for GIMP. http://www.gimp.org
It runs well on a mac, and the interface looks pritty much like Adobe Photoshop. You will no longer notice, that under the hood it is a unix application.

With Yosemite or Mavericks you'll need version 2.8.14p1.

One more advantage - the application bundle is much smaller than what the Adobe suit will install. That is nice on a MacBook Pro with a small SSD drive.