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But despite having over a year to work out the kinks with AFS, Apple rolled out High Sierra with a big caveat: AFS will only work with SSDs for now. In addition to the aforementioned reasons AFS is necessary, it also theoretically improves performance and security. Most notably, though, without Metal 2 those pricey iMac Pros would be all dressed up with 18 CPU cores and Radeon Vega GPU but have nowhere to go. To compete with Windows-based gaming laptops and mobile workstations, most which don't concern themselves with the thinness to the extent Apple prizes, the company had to add the ability to connect to an external GPU we won't even see those until mid-2018. #Macos sierra performance update#And the company's Metal graphics programming interface really needed the Metal 2 update for several reasons, such as helping Apple overcome its reputation as a VR no-show and creating an efficient way to develop for both iOS and MacOS.Plus, SSDs have different failure characteristics than hard disk drives - one bad bit and buh-bye - so the file system needs different types of redundancies and checks for reliability. #Macos sierra performance pro#At the very least, AFS' 64-bit addressing is essential to the upcoming iMac Pro for many reasons, not the least of which is the ability to support that system's configuration with a 4TB SSD and higher.
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