![]() 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. ![]() In this guide, we will look at some of the installation problems that tend to occur with new releases of the Mac operating system.
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