The process involves a simple Terminal command, and allows you to continue using your Mac as the update downloads and the initial software installation takes place in the background.
Remote Install Mac OS X was released as part of Mac OS X 10.5.2 on February 12, 2008. Starting with the March 2009 version, the Mac Mini also supports Remote Install, allowing the DVD drive to be replaced with a second hard drive. With the launch of Mac OS X Lion, Apple has omitted Remote Install. A workaround is to enable Target Disk Mode. Apr 15, 2014 · Continue to keep these buttons held until you hear the Mac startup chime twice. After the second chime, let go of the buttons and let your Mac restart as normal. No user data will be lost in this process. Resetting your PRAM will not only fix this particular OS X install issue, but it can also fix network issues, sound issues, and display issues. Method 1: Using Internet Recovery to Reinstall OS X. Turn off your Mac. Hold Command + Option + R and click Power button. Keep holding the keys you see a spinning globe and a message “Stating Internet Recovery. Then, this message will be replaced with the progress bar, wait until the progress bar fills or completes. Sorry Dan, altering the date via terminal was a lost of time. It didn't work for me . What did work was using a bootable usb. In a friend's Mac, download the desired OS installer (High Sierra in my case for my MacBook Pro Late 2011 - google "How to Download a Full macOS High Sierra Installer App") and create the bootable USB, HDD or even SSD with Disk Creator (2 steps very friendly freeware Sep 19, 2018 · In the old days, you could reinstall the OS through the DVD that shipped with your Mac. But since new Macs don’t have an optical drive, we’ll use the built-in Recovery Mode to do so. This will work on any Mac running OS X 10.7 Lion or later. Apr 10, 2020 · Format a Mac's Drive Using Disk Utility (OS X El Capitan or later) After the non-startup drive is erased, you can jump to the section titled, "Clean Install of macOS Sierra." Preliminary Steps for a Clean Install on a Mac Startup Drive Jan 16, 2016 · Now quit Disk Utility and click reinstall OS X at the top and wait for it to finish and restart. This will put you on the OS X version that came from the factory. You can update to El Capitan after if you like. What you are seeing locked there in your second screenshot is the Recovery HD partition, and that is as it should be and not the problem.
Step 4: Reinstall Mac OS X without Losing Data When you get the macOS Utilities window on the screen, you can just click on the “Reinstall macOS” option to proceed. Afterward, you simply need to follow this basic drill to reinstall macOS on your system. A confirmation message will appear, informing you about the reinstallation details.
Apr 23, 2020 · Here you go, now you know how to reinstall Mac OS X, speed up your Mac with CleanMyMac X, do proper backups with Get Backup Pro, and even recover lost files with Disk Drill. Best of all, you can try CleanMyMac X, Get Backup Pro, and Disk Drill absolutely free for seven days via Setapp , a platform with more than 170 cool macOS utilities and It should only take a minute or two for the drive to be erased and reformatted. Now your drive is ready for OS X. Install OS X. There are two ways you can install OS X on to your external hard disk: by reinstalling OS X from the OS X Utilities repair screen or by downloading OS X from the App Store and running the installer. The process involves a simple Terminal command, and allows you to continue using your Mac as the update downloads and the initial software installation takes place in the background. Jul 18, 2013 · New Mac systems built in 2010 and later support an Internet Recovery mode, which can be used to download the boot image generally stored on the OS X Recovery partition so you can run diagnostics.