The problem with the upgrade to macOS Mojave, which some Mac users are facing. According to reports on the official Apple technical support forum. Almost everyone who was not lucky enough to face such a problem complains about the completing the installation. The error occurs after a few minutes it starts.
The most common problem is a failure in the bridge OS firmware which ensures the operability of the Touch Bar, which in turn is due to the inability to complete certain processes with the T2 chip.
According to some users, they’ve received confirmation from Apple that the root cause of the problems that prevent the installation of updates is a secondary processor. And because this problem is only with MacBook Pro 2018 Pro and iMac, and the problems often occur in them.
Can not install macOS Mojave. What to do?
Although the problem is still not fixed. And the installation of macOS Mojave may be interrupted before the process is completed. There are several ways to work around the system and even install the update.
The first method is installing from external media. This method, though is not universal, and therefore cannot guarantee a positive result, has helped some users who have experienced problems with the update.
The second method is more complicated. It requires you first to save a backup using Time Machine, and then start the installation process. If a failure occurs, you need to go into recovery mode by holding the CMD + R key combination while the system is booting. After that, you should format the disk using Disk Utility and connect to the Network using an Ethernet cable. You must have the quality and good speed of the Wi-Fi connection.