This Photoshop tutorial video will teach you how to install the free Photoshop CC plugin in less than a minute. Need to download some free Photoshop brushes to go with it? Try the free sampler set.
Note: this Photoshop plugin installation video was recorded on a Windows computer but apart from the the unzip/extract process being slightly different, all the rest is virtually identical
Any trouble check the help page or send me an email.