Reinstall from macOS Recovery

Mac OS X Yosemite 10.10 is another product in Apple's line of Mac OS X titles. Mac OS X Yosemite 10.10.5 desktop Yosemite includes various improvements over previous versions, one of the most prominent being the introduction of FaceTime, which is part of the Continuitypackage whicl allows users to accept and send calls from their computers in OS X 10.10. Click on the install button to get GoodEye for Windows PC. Install GoodEye for Mac OS. Get BlueStacks on Mac via this link. Install it just like PC software. Once done, open it and enter information such as Date, language, time, etc; After that, you will see the main homepage of BlueStacks. From the homepage click on My Apps System Apps Google Store. However, the Mac boasts an impressive growth rate: Shipments increased 27.7 percent in the first quarter of 2011 over the same period in 2010, even as overall computer shipments dropped 1.2 percent source: Elmer-DeWitt. So, which is better - Mac or PC? Click through our list of 10 differences between Macs and PCs and decide for yourself.

macOS Recovery makes it easy to reinstall the Mac operating system, even if you need to erase your startup disk first. All you need is a connection to the Internet. If a wireless network is available, you can choose it from the Wi-Fi menu in the menu bar. This menu is also available in macOS Recovery.

1. Start up from macOS Recovery

  1. MacOS is the operating system that powers every Mac. It lets you do things you simply can’t with other computers. That’s because it’s designed specifically for the hardware it runs on — and vice versa.
  2. In the strictest definition, a Mac is a PC because PC stands for personal computer. However, in common use, the term PC has typically meant a computer running the Windows operating system, not the operating system made by Apple, Inc.

To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following combinations on your keyboard. Command-R is generally recommended, especially if your Mac was never upgraded to macOS Sierra 10.12.4 or later.

Command (⌘)-R

Reinstall the latest macOS that was installed on your Mac (recommended).


Upgrade to the latest macOS that is compatible with your Mac.


Reinstall the macOS that came with your Mac, or the closest version still available.

Release the keys when you see an Apple logo, spinning globe, or other startup screen.

You might be prompted to enter the login password of an administrator of this Mac, or your Apple ID password, or a firmware password. If so, enter the requested password to continue.

When you see the utilities window, you have started up from macOS Recovery.


2. Decide whether to erase (format) your disk

You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase. If you need to erase your disk before installing macOS, select Disk Utility from the Utilities window, then click Continue. Learn more about when and how to erase.

3. Install macOS

After starting up from macOS Recovery, choose Reinstall macOS (or Reinstall OS X) from the Utilities window. Then click Continue and follow the onscreen instructions to choose your disk and begin installation.

If the installer asks to unlock your disk, enter the password you use to log in to your Mac. If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk.

Please allow installation to complete without putting your Mac to sleep or closing its lid. During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.

If your Mac restarts to a setup assistant, but you're selling it, trading it in, or giving it away, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.

If you never upgraded to macOS Sierra 10.12.4 or later

If macOS Sierra 10.12.4 or later was never installed on your Mac, macOS Recovery works differently:

  • 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 isn't available.

Learn more

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