I have been using Adobe Photoshop to stack my exposures of whatever my target is. It's getting frustrating quickly. I have to manually stack all of my photos, which means moving the images pixel by pixel to line them up and then average them. I'm using a Mac and it looks like software like DeepSkyStacker and other free stackers are only for Windows. I would rather not pay for a software unless there's good reviews for it. I am mainly doing wide-field (roughly 4 degrees on each side of a square for my FOV). Any suggestions on what auto-stacking software is out there?