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How install Yosemite on Macbook Pro from USB?
How to Install Mac OS X Yosemite on a USB Flash Drive
- Download a copy of Yosemite from Apple.
- Reformat your USB drive using Disk Utility.
- Select the drive and switch to the Partition tab.
- Click on the “Options” button and Choose “GUID Partition Table.” Click OK and then Apply.
How do I do a clean install of OS X Yosemite?
How to Perform a Fresh Installation of OS X Yosemite on a Mac
- Back up the Mac with Time Machine or by manually copying your most important data to an external drive – never skip backing up your important data.
- Attach the OS X Yosemite bootable installer drive to the Mac, then reboot as normal.
How do I manually install Yosemite?
Restart your computer, and immediately hold down command-r until the gray Apple logo appears. If prompted, select your main language and then click the arrow. Click Reinstall OS X, and then Continue. Follow the instructions on the screen, and then choose your hard disk.
How do you install OS X on a Mac?
Install macOS or OS X from Internet Recovery Mode, which you can boot into by holding option+command+R while your Mac powers up. Download the relevant macOS or OS X installer from Apple, then use Terminal to create a USB installer you can boot up from. Or use the OS X installation disc that came with your machine — or buy a new one — to boot up
Can you boot a Mac from a flash drive?
You can boot your Mac from the USB flash drive to install the software on your Mac’s hard drive, Your USB drive will be erased and needs to have at least 12 GB of storage. To create a bootable USB installer, you need a working Mac and you need to be comfortable using simple Terminal commands.
Do you need a disc to install OS X?
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.
Is it possible to reformat an external hard drive on a Mac?
Disk Utility can be used to format external drives as well. It’s easy to reformat your hard drive using Disk Utility in macOS or OS X. If your Mac doesn’t work, you can do this using a second Mac and an external hard drive caddy. Otherwise, you can skip this step and do it from the Utilities page during the macOS or OS X installation.