Download and install this Greenshot for Mac OS X.To use this app, here are the steps to follow. This tool also enables you to easily upload your captured screenshot to a free cloud storage provided by the developer. You can add lines, shapes, texts, blur effect, etc. If you want to add annotations to your screenshot, then this program allows you to do that upon the creation of the screenshot. Upon using this tool, you can easily take screenshot of anything on the screen, including regions, windows, menus, webpages, the full screen, etc. This screen capture tool is designed solely for Mac OS X, thus it fits well without any incompatibilities. Best Alternatives to Greenshot for Mac 1. Some of the best ones are introduced in the following. So, many of you may wonder if there’s a Greenshot Alternative for Mac. However, currently, Greenshot is only available for Windows OS. It also has an editing tool for adding basic annotations and sharing screenshots instantly to social media sites. With this tool, user can take screenshot of anything display on the screen, no matter it’s a selected region or the whole screen. Greenshot is a well-known open source screen capture application that is capable of providing good quality screenshots.