If the upgrade goes wrong, you just do this:ġ. Boot from it and it will look EXACTLY like the internal (the only way to tell them apart is to go to "about this Mac" (Apple menu) and see what it says. When done, you'll have a fully bootable "clone" of the internal drive. Just to the right, select your TARGET drive (the USB drive) On the left, select your SOURCE drive (the internal drive)Ĥ. You can accept the defaults for now (I usually turn "safety net" OFF for a true "clone")ģ. Connect the USB drive and initialize it to HFS+ with journaling enabled (using the Disk Utility app)Ģ. Both of these are FREE to download and use for 30 days.ġ. You'll need either CarbonCop圜loner or SuperDuper. You'll need an external USB hard drive large enough to back up your internal driveĢ. Here's what you need to get and what you need to do:ġ. If you DON'T do it, and the upgrade doesn't go well, you'll find yourself "up the creek without a paddle to get back". there's a VERY IMPORTANT THING that you must do first. no matter which new version of the OS you try. Too many folks having problems with HS right now.īUT. I'd suggest Sierra instead of High Sierra. Since none of those situations seem to match the described circumstances. A bootable thumb drive installer can be a useful tool, especially if you have poor internet, a pre-2011 Mac that's not capable of Internet Recovery, are running MacOS betas, and/or if you're replacing the Mac's HD. It is a bit more "suspenders-and-belt," and definitely more time-consuming. There's nothing wrong with the other procedure outlined. If the worst happens, you restore from Time Machine. If all goes well, there's nothing else to do. To go this route, just make sure you do a final Time Machine backup prior to upgrading the OS, then upgrade MacOS via the App Store. You'd then be able to pick the date/time you want to restore to, and just walk away until the restore is done. To do such a roll-back, you'd boot the Mac into the Recovery system > Restore from Time Machine backup. Time Machine allows you to roll-back to a previous period in time (such as just before you upgraded the OS), restoring the entire computer to the state it was at that moment. There is an alternate approach to this, if you're making Time Machine backups. Clone current drive to external USB drive, download new macOS installer from Mac App Store, create new bootable USB installer, upgrade software. I download the macOS Installer once, install on each system. I have two Macs, so it is handy to have the bootable USB installer thumb drive. Use your favorite search engine to look for "mac OS High Sierra bootable USB." There will be a number of online articles that explain how to create and use a bootable USB thumb drive with the High Sierra installation instructions. Just leave it in the Applications folder and go home.Īcquire an 8GB USB thumb drive or an 8GB SD card and appropriate card reader. Set aside.ĭownload the macOS High Sierra Installer from the Mac App Store at whatever location has decent Internet, but do not run the installer. Boot from the external USB drive to verify that the copy is functional. Use Carbon Copy Cloner and clone your Mac's drive running Yosemite. First of all, you should be making regular backups (with Time Machine or another archiving utility) on a regular basis, regardless whether or not you will be imminently upgrading your computer's operating system.Īcquire an external USB drive that is the same size or a little larger than your Mac's drive.
0 Comments
Leave a Reply. |