APFS is a new, advanced storage architecture providing an extensible foundation to support new features and future storage technologies on the Mac.MacOS High Sierra also includes a number of refinements to the apps Mac users enjoy everyday, including Photos and Safari. The Core ML developer framework makes it easy to create apps with powerful machine learning that predict, learn and become more intelligent. Metal 2 powers virtual reality content creation, faster performance and more. A new file system ensures more efficient and reliable storage, and support for High-Efficiency Video Coding (HEVC) brings stunning 4K video at lower file sizes. With, Mac users gain powerful new core storage, video and graphics technologies. I recently purchased a Nikon D700 and I had to install the software on my MAC so that my photos can be transferred between the camera and computer. I upgraded my imac pro laptop to high sierra and now nikon transfer for nikon d600 wont work. Posting Permissions You may post new threads. Any Issues with High Sierra for Mac? Nikon D50 issue with lens/autofocus. Part of the reason will be to take advantage of the latest updates. I am thinking of updating my system software from Mavericks 10.9.5 to High Sierra.