Apple released OS X Yosemite to the masses on Thursday as a free upgrade, so plenty of users are likely already busy preparing to install the new operating system.
As with OS X Lion, OS X Mountain Lion and OS X Mavericks, Apple makes it easy for users to install the upgrade by downloading Yosemite from the App Store and running the installer.
Then with the drive back inside his Mac he was able to reformat the drive using either a OS install DVD the system came with (grey disk) or the retail version. The other way would be using an external bootable OS-X drive (USB, FireWire or Thunderbolt). I've created a bootable USB thumb drive just for doing this. While slow it does get the job done.
Mac Os X Yosemite New Hard Drive 2020
See also: OS X Yosemite Review: An Equal Partner for iOS 8
For most users, this is the best way to upgrade because it keeps your data and existing programs intact. However, perhaps you don't want to do a regular OS upgrade, or maybe you need to install Yosemite on a machine that doesn't already have OS X installed. For those users, the best bet is to do a clean installation, erasing the hard disk and installing from scratch.
- Requirements for Installing Yosemite onto an External Disk An external drive (USB thumb drive, hard drive, SD card, any external disk) with 16GB of space available or greater (the base OS X 10.10 installation uses about 10GB, and you’ll want some extra space for swap, caches, and test files) A Yosemite compatible Mac.
- Mac OS X 10.10 Yosemite is one step closer to your Mac desktop. The public beta of Apple's next computer operating system will be released Thursday at 10 am PT. After checking it out for more than.
It's possible to do a clean install of OS X Yosemite on your Mac — or on a new hard drive, if you're upgrading or repairing your Mac — but it takes a bit of work.
If you went through the clean install process last year, these instructions will look familiar. With a bit of time, it's relatively easy to create a bootable copy of OS X Yosemite that you can run from a USB stick or other drive.
Note: A clean install will erase all of the contents on your disk drive. Make sure to back up your important files, settings and apps before proceeding.
After the Install
After installing OS X Yosemite, you can start restoring your programs and settings using either a Time Machine backup or Migration Assistant.
Image: Apple; Lion DiskMaker