This is a good reason to download the official copy from the Mac App Store or join the free public beta program if you want to try out a new version of the Mac OS early. The error message seems to occur most often when the Mac installer is downloaded from a third-party site. It may seem odd but the usual cause is a corrupt installer, and simply deleting the installer app and downloading a new copy will likely fix the issue.
This message usually shows up as a sheet that drops down from the macOS or OS X installer shortly after you start the install process. With the backup recommendation out of the way, let’s get started with the error messages.Ĭould Not Write Installation Information to Disk You can find a large number of external enclosures, drives, and SSDs, as well as a portable and easily-carried-with-you Envoy Pro EX high-performance USB 3 or Thunderbolt bus-powered SSD storage. If you don’t have a backup system in place, I highly recommend investing in one before you install a new version of macOS. Having a Time Machine backup or a clone of your current system can be a lifesaver. Some of the installation issues we’re going to mention can cause loss of data. Installation Issues Commonly Seen with macOSīefore we get too far along, I want to point out the obvious: don’t install a new version of the Mac operating system without having a current backup.
With any luck, you may be able to either correct the issue, allowing you to finish the installation, or prevent the problem from occurring in the first place. Proper computer knowledge is quite easy to acquire if you spend the time to learn.In this guide, we will look at some of the installation problems that tend to occur with new releases of the Mac operating system. I've been using computers and building my own since I ever owned an iPhone or a Macbook Pro. They generally work most of the time, and when something goes wrong, it was ALWAYS be explained, I guarantee this as the truth :)Īlso, I always back up my machines. Sometimes stuff happens, but these are computers, after all - not magical machines that always work. I have since installed Yosemite on both of my Macbook Pros without any problems. There are issues here and there, but please do not think that Steve Jobs was this magical all-powerful force whose passing could possibly have any effect on whether or not Yosemite is a worthwhile upgrade. I've been an iOS Developer and Apple OSX and iOS user since March of 2011 and my experience since then has only continued to improve. Steve Jobs was a great man but hardly has there been any change since he passed away. Reinstalling from there will install OS X 10.10.1 (the updated version) anyway, because it always installs the latest, assuming Apple has gotten around to putting it on their installation servers.įirst of all: don't be ridiculous. It is very unlikely that you will lose your data doing that, so fear not. In that case, boot the computer while holding Command-R and it will boot to the recovery partition. Last possible scenario, it will not boot to OS X anymore. This time, turn off any kind of virus protection you have, if any.
In that scenario you would download the update manually and install it again. Next possible scenario, it will boot up to 10.10.0 or some freakish hybrid with part of 10.10.1 installed, but function well enough for you to boot it. Since it's stuck, the only thing you really can do is manually power the machine off.īest case scenario, when you turn it on, it will carry on installation from where it left off.