Oct 18, 2015 · OS and disc formatting need to be done first. I wanted to install a new OS into a mac mini and had no previous useable HD. The way I successfully did it was: Connect SSD via SATA cable to a Mac. (SSD icon shows on desktop) Disc Utility - Erase SSD, then partition SSD and give it a name. Insert flash drive with bootable OS ( icon appears on desktop)

Reinstalling Mac OS from the Recovery allows installing different versions of the operating system. Hence, before you start following the instructions, you have to make sure which version you want to reinstall. Reboot the computer and hold down one of the following key combinations in order to reinstall your preferred macOS version: Reinatalling the os alone does not erase data. But I do still recommend taking a backup by booting into recovery and click Utilities in the upper menu bar and then select terminal then type csrutil disable then type reboot then when your Mac boots up and when you hear the chime hold CMD+S then wait until the plain text is done loading then type mount -uw / then grab a pen drive to plug in to Start up your Mac from a shut down state or restart it, then immediately hold down Command-R. The Mac should recognize that there’s no macOS Recovery partition installed, show a spinning globe. Jan 25, 2017 · Restore Mac OS or Re-install Mac Os Using Internet Recovery for Mac Operating System - Duration: 3:24. Techable 10,689 views. 3:24. Step 1. Insert the Mac OS X DVD that came with your Mac or the installation DVD for the version of Mac OS X that you run. Double-click "Optional Installs" on the window that appears, then double-click the Optional Installs package file within the folder. Jun 07, 2017 · 2: Apple_HFS OS X Base System 250.1Gb disk0s2 /dev/disk1 (disk image): #: Type Name Size Identifier 1: untitled. +5.2Mb Disk1 It goes on for another 15 disk to 16 all maker identical to disk1. Also I cannot boot the Mac; it goes straight to recovery options and if I try starting it with r+CDM held it actually does nothing it seems. May 20, 2019 · How to Reinstall mac OS Without Losing Personal Data. Reinstalling macOS (sometimes also called a “factory reset”) is usually a rare event, and you shouldn’t have to worry about it too much. But there are specific issues, self-inflicted or not, that are much quicker resolved with a clean installation of the OS.

Give the Partition a name, make sure the format is Mac OS Extended (Journaled) and click 'Apply'. 3. If the Scheme is set to GUID Partition Map, skip to step 4. If not, click the Erase tab, change

Command-R is still the recommended way to start up from macOS Recovery. This combination makes sure that the installation isn't associated with your Apple ID, which is important if you're selling or giving away your Mac. Option-Command-R installs the macOS that came with your Mac, or the closest version still available. Shift + Option + Command + R: This will reinstall macOS version that came pre-installed on your Mac or the closest version that is available to it. This option works on macOS Sierra 10.12.4 or later including macOS Catalina. Reinstall macOS on the Mac. 1. Now from the macOS Utilities window select the ‘Reinstall macOS‘ option. 2.

Jun 07, 2017 · 2: Apple_HFS OS X Base System 250.1Gb disk0s2 /dev/disk1 (disk image): #: Type Name Size Identifier 1: untitled. +5.2Mb Disk1 It goes on for another 15 disk to 16 all maker identical to disk1. Also I cannot boot the Mac; it goes straight to recovery options and if I try starting it with r+CDM held it actually does nothing it seems.

Restoring your computer back to its original state, whether on Windows or Mac, is a whole lot easier than it used to be—restore partitions (original copies of the OS integrated into your laptop Sep 06, 2019 · Use a Mac OS X installation Disc. If you’re unable to use Internet Recovery Mode or create a bootable USB installer, you can still use a Mac OS X installation disc. These discs are available for OS X Snow Leopard, OS X Lion, and OS X Mountain Lion. If your Mac is from 2012 or earlier, there was an installation disc in the original box. Dec 14, 2014 · I’m trying to re-install OS X on a mac mini currently running Yosemite 10.10.3 from the built in recovery partition. I have erased HD, de-authorised from iTunes and signed out of iCloud in readiness to sell the machine – however it is only re-installing Mountain Lion – which is the version of OS X that came when purchased. There, the Mac reaches out over a Wi-Fi or ethernet connection to download the relatively modest Recovery software, which then bootstraps the download of the full macOS installer. Jan 22, 2013 · In order to reinstall Mac OS first you have to download the latest version of the operating system. Launch the "App Store" from the Dock. In the appeared window select the latest Mac OS operating Jul 24, 2018 · The problem may be that your Mac is trying to install a version of OS that was last installed on this particular computer. This may be an issue especially if this is a second had, used Mac. Please follow these steps: Start up your Mac in Internet Recovery Mode. Reinstalling Mac OS from the Recovery allows installing different versions of the operating system. Hence, before you start following the instructions, you have to make sure which version you want to reinstall. Reboot the computer and hold down one of the following key combinations in order to reinstall your preferred macOS version: