HOW TO INSTALL OS X OFF BOOTABLE USB UPDATE

This almost always results in a Mac running faster after a clean install, since macOS has started over with a clean slate. Hold down Option/Alt and press the Power button. Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes. Another benefit of using a bootable disk for a macOS installation is that you can perform a clean install.Ī clean install allows you to get rid of junk apps and files that may have accumulated over time. Make sure the bootable installer (USB flash drive) is connected to your Mac. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions. These include regaining access to a Mac that refuses to boot or recover files that seem to be lost. Select the FAT32 file system to be able to boot either BIOS-based or UEFI-based PCs. Format the partition: Right-click the USB drive partition and choose Format.

Open Disk Management: Right-click on Start and choose Disk Management. Eject it, take it out of the external enclosure, install it in the Mac and you can simply boot up to your exact system. Connect the USB flash drive to your technician PC. To boot from your USB drive, set your bootable USB as your startup disk for the next boot in System Preferences -> Startup Disk, then click. Plug that into your Mac and, after formatting it, using CarbonCop圜loner or SuperDuper, create a bootable clone of your system on the new drive. You can also use the built-in recovery tools that come with the macOS installer to troubleshoot and fix different kinds of issues. Step 1 - Format the drive and set the primary partition as active. This can save quite a bit of time, considering the most versions of macOS have an installer size of 12GB.

HOW TO INSTALL OS X OFF BOOTABLE USB UPDATE

Why Would You Need to Install macOS From a USB?Ĭreating a bootable USB drive and using it to reinstall to macOS is a bit of a lengthier process as opposed to simply updating macOS from the Software Update section of the System Preferences, but it has its benefits.Ĭreating a bootable USB disk allows you to install or update macOS on multiple systems without having to download the installer on each Mac.

How to install os x off bootable usb