And the odds are it’ll work out just fine for them. Most people, of course, skip directly to step 4. If anything goes wrong in step 4, you have nothing to worry about, because you know that you have a complete, bootable backup. Pop in the installer DVD and launch the “Install Mac OS X” app.Test that the backup is indeed bootable and up to date.Do a complete backup clone to an external FireWire drive.(That’s what I do, when upgrading from previous developer seeds.) If you’re not a typical user like, say, if you’ve been running pre-release developer seeds of Leopard, or if you’ve diddled with your 10.4 system software in unholy ways and really would like a factory-fresh start with 10.5, then I recommend the Archive and Install option. Apple’s installer engineers spend a ton of time making the default upgrade procedure as convenient as possible. The reason Apple makes it the default and most obvious way to upgrade is that it’s the most convenient, and most tested upgrade path.Īrguments that there is something mysteriously dangerous or deficient about the default upgrade procedure - and that you should do a clean install instead, followed by tedious hours manually migrating software and data and preferences from your old installation - are voodoo. The default upgrade is the best choice for most users almost all the time. Then boot from the installer DVD, follow the on-screen instructions, and perform a default upgrade. The odds of an OS installation corrupting a FireWire volume that is not plugged in are zero. The odds of an OS installation corrupting a plugged-in FireWire volume are very small. Next, shut down the computer, and unplug the external backup volume. Better safe than sorry, though, so I never skip this step. Since I’ve been using SuperDuper, this has always been the case - I have never failed to successfully boot from my backup drive. SuperDuper is ranked 1st while CarbonCopy Cloner is ranked 2nd. In the question What are the best apps for making bootable backups of your Mac. What you want to see is something that looks exactly like booting from your regular internal hard drive. When comparing SuperDuper vs CarbonCopy Cloner, the Slant community recommends SuperDuper for most people. Next, boot from your external backup volume to make sure that it works. That way, if anything goes wrong, I can revert to exactly the state the system was in before installing the upgrade. Before I install an upgrade, I quit every running app and run a fresh backup to create a snapshot of my boot volume. I use SuperDuper’s “Smart Update” feature to clone my boot volume every night - the “smart” aspect is that it only changes the files that have changed since the previous backup. If you don’t back up before upgrading your OS, you’re really foolish. If you don’t back up daily - or at least very regularly - you’re foolish. ( Carbon Copy Cloner would be my second choice.) (Atypical users would include anyone who ran developer seeds of the OS.)įirst, make a complete backup of your current boot volume to an external FireWire drive using SuperDuper. Here’s how I recommend installing major new OS releases for typical users. I Believe in Murphy’s Law Friday, 26 October 2007
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