Now quit Terminal application, and run the OS X El Capitan installer again. That will set the computer to at 4:00pm, enter your current date and time. Just type in “ date” with format mmddHHMMYYYY, example: date 020416002018 I then opened up Terminal while in the recovery menu and reset the date to today. They must have left the computer unplugged and the battery died and reset the system time. So,a) Recovery mode (hold Cmd + R while booting) not. After wasting an hour messing around, I noticed the clock date was reset to. PROBLEM : Mac OS X Big Sur Installation failed because of lower disk space. I remember having this problem once before.
I know this machine was working fine, but I’m getting an error when trying to run the installer.Įrror message: An error occurred while preparing the installation. Recover mode, gives the option to reinstall OS X El Capitan. He booted in recover mode Command-R at startup, did the usual, first formatted the drive, then went to do the installation. They had previously upgraded all the way to the newest operating system macOS Sierra version 10.12.6 and they wanted to do a clean installation to sell the computer on eBay. I was trying to reinstall an old Apple MacBook Pro from 2009 for a friend.
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