#Mac os x boot disk selection mac os x#
#Mac os x boot disk selection install#

Select Show All Disks and choose your USB. Click through the license agreement until prompted to select the disk to use for OS installation. Open the previously downloaded macOS installer.

#Mac os x boot disk selection mac os x#

Start up fromВ anВ OSВ XВ startupВ volumeВ when the Mac would otherwise start up from a non-OSВ XВ startupВ volume.Д®ject (вЏЏ), F12, mouse button, or trackpad buttonД®ject removable media, such as an optical disc. Select Mac OS X Extended (Journaled) and GUID Partition Map. Reset NVRAM.В Release the keys after you hear the startup sound again. Start up from OS X RecoveryВ over the Internet. Start up from aВ NetBoot server using the default boot image. Start up from a compatible NetBoot server. Start up to either Apple Hardware TestВ or Apple DiagnosticsВ over the Internet. Now either launch the OS installer or use the command line arguments to create a bootable drive and setup the OS installer. Start up to either Apple Hardware TestВ or Apple Diagnostics, depending on which Mac you're using. From a working Mac open Disk Utility and reformat the thumb drive to GUID partition map and create a Mac OS Extended (Journaled) partition, that should fix the thumb drive.

#Mac os x boot disk selection install#

Start up from a bootable CD, DVD, or USB thumb drive (such as OS X install media). The links below point to other support documents on Apple's website. I'm betting many of you don't know them all, either, so here they are. ItвЂ™s pretty annoying having to hold the option key, every time your Mac boots, in order to be able to choose if you want to boot into your Linux drive or macOS.

If you have multiple operating systems installed on your computer, or if you are trying to boot off various utility or other boot disks, you may run into. I was personally familiar with these and several others, but it turns out there are 15 total combinations, thanks to a KnowledgeBase article Apple posted. LetвЂ™s say you want to keep your dual-boot. Boot device selection options in Mac OS X. Command-S is for 'single-user mode,' which essentially means booting to the command line.

Shift key, for instance, starts your Mac in Safe mode, and C (or c) starts up from a bootable CD, DVD, or thumb drive. Your Mac and OS X have a variety of startup keys and key combinations you can use to affect how the device starts up. Is your Mac OS partition loaded as read only Can you go to Control Panel -> Boot Camp -> Startup Disk and see if the Mac OS partition is available as a choice You can select it there to boot into. purchase and download it from the Mac App Store.-Locate the OS X Lion installer and right-click on it.