You can't use OneEdit Pro from within Evernote. What I do is usually save a lot of images to the camera roll (I'm almost always using an ios device) then open OneEdit and import them all into there...you just select a group of pics at one time but you can add to or remove from that batch if you want at anytime. Then I add several editing tasks...I usually use crop, scale and add borders, but you can add watermarks, flip or rotate, apply filters...there are maybe 30 different filters, remove gps info, change to grey scale, add image overlays...there are quite a few editing functions available...and then execute all the edits with one command. Last export them as a group back to the camera roll and add them to Evernote the normal way. It's a few more steps but a lot faster than editing each image individually which is what I used to have to do.
Sorry I don't think there's a Mac version.