macOS 10.The date format is mmddHHMMyyyy (month-day-hour-minute-year) Keep in mind that for every OS you might need to set the right date: These examples below set the date to one day after the official release date of each version. Click continue and you are now good to go.Open the terminal again, set again the date to date 101615072016 becasue the internet connection has changed that back to your current date and unplug the ethernet cable. Then you will see this image, click "continue" so the computer will verify the certificate. The internet connection will download some files. After this operation exit the Disk Utility and open up a terminal, type date and look at the date of today: you will see the date of today, then type date 101615072016: and thanks to this command you have changed the date to 2016.Setup starts, format your main HD and rename it Macintosh HD or whatever name you prefer.Plug your computer to internet through an ethernet cable. How to upgrade from OS X El Capitan to macOS Big Sur Open Safari and click on this link.The problem was that today is is a day in March 2020. Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High. I was trying to factory reset a MacBook Pro 13-inch Retina from Early 2015 with OS El Capitan. macOS High Sierra 10.13.2, Security Update 2017-002 Sierra, and Security Update. I had to try multiple times but here I'm with my solution. Check compatibility Make a backup Get connected Download OS X El Capitan Install the macOS installer Begin installation Allow the installation to complete. I have tried using TransMac but the drive doesn't seem to be recognized as a bootable device by the iMac.Īre there any other steps that I can try to make this work and escape this boot loop? I do not, however, have any other Macs in my home. This does not appear to be the issue though as when I run the date command it returns the correct date and time (although the wrong timezone - PDT instead of the correct MDT).įurther research suggests I may have to use a bootable USB with the OS X installer on it. To upgrade Mac OS X El Capitan to macOS Sierra 10.12, the latest updates from Apple.Inc, Download the macOS Sierra 10.12.1 latest version from Apple App Store. When I search for information about this error, I found suggestions to use the Terminal date command to set the correct timestamp. When I try to use the Alt (Option) key to select a recovery boot it just restarts back into the installer without giving me an option to select a boot source. I hit restart and I end up in a boot-loop. Quit the installer to restart your computer and try again. Contact the software manufacturer for assistance. OS X could not be installed on your computer During the install I receive the following message: I downloaded the "app" from the Store on the iMac and restarted to begin the installation process. It came to me without any updates since early 2016 and I decided to update it from OSX Yosemite to El Capitan (the last version supported on this hardware.) The script will also Replace CoreServices and /User/boot/32 with the new Boot.I have a new-to-me early-2009 iMac.Run the script to fix permissions on boot.efi.Once booted, download the post-install script.To download any new macOS and install it, you’ll need to do the next. type csrutil disable reboot (this reboots the Mac) If your Mac is from 2010 or older, its limit is macOS High Sierra.
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