I have posted information earlier to the list about High Sierra. There have been people who have upgraded to High Sierra without first preparing to upgrade. So please don’t make the mistake of upgrading without first preparing for macOS High Sierra 10.13.
Prepare to upgrade to macOS High Sierra 10.13 Make sure your computer can run High Sierra iMac models from late 2009 or later MacBook models from late 2009 or later MacBook Pro models from mid 2010 or later MacBook Air models from late 2010 or later Mac mini models from mid 2010 or later Mac Pro models from mid 2010 or later Here are the Mac’s Model Identifier: iMac10,1 or newer MacBook6,1 or newer MacBookAir3,1 or newer MacBookPro6,1 or newer Macmini4,1 or newer MacPro5,1 or newer If your Mac isn’t on that list (or has an older model number), then regardless of its age or speed, it won’t run High Sierra. RAM High Sierra requires a minimum of 2GB of RAM, but more RAM 4GB - or more is better for your Mac’s performance. Firmware Updates Some Macs may require updated EFI or SMC firmware to run High Sierra. To see if a firmware update is available, check this webpage <https://support.apple.com/en-au/HT201518>. Unless you previously hid them from the list, firmware updates should also appear when you choose Apple > App Store and click Updates (in Yosemite and later). Free Disk Space Apple says that the High Sierra installer requires 14.3 GB of free storage space to perform the upgrade (and that after the installation is finished, High Sierra will occupy about 1.5 GB more than Sierra did). Although you may be able to get away with exactly 14.3 GB free, you’ll do much better starting at least 20+GB of Free Space (before downloading the installer). Even more free space is better of course. Some High Sierra features will require increasing amounts of disk space as you use them. You need to have ‘room to grow’. OS X 10.8 Mountain Lion or Later In order to install High Sierra, your Mac must be running 10.8 Mountain Lion or later. Update Your Third-party Software before installing High Sierra RoaringApps maintains a wiki listing hundreds of Mac and iOS apps and the current status of their compatibility with various operating system versions, as reported by users. If you are using Microsoft Office you can check Microsoft’s support article for compatibility Microsoft Office support for macOS 10.13 High Sierra <https://support.office.com/en-us/article/Microsoft-Office-support-for-macOS-10-13-High-Sierra-80bbd3cc-2412-4593-988a-1c5607b26b28> Check your current Printer is compatible with High Sierra Update the Printer Drivers and Software to High Sierra compatible BACKUP BACKUP BACKUP! ‘Time Machine backup’ and a ‘Bootable Duplicate Backup’! Test your Duplicate - you should test the duplicate to make sure it truly is bootable before taking the plunge and upgrading to High Sierra. Cheers, Ronni 13-inch MacBook Air (April 2014) 1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz 8GB 1600MHz LPDDR3 SDRAM 512GB PCIe-based Flash Storage macOS High Sierra 10.13
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