The specific device model determines whether you can install the latest macOS.

Don't put your Mac to sleep or closing its lid until the installation completes.

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 first.

Follow the instructions on the screen to proceed. Select 'Reinstall macOS' to start reinstalling macOS directly.

Create a Recovery partition on an external hard drive.

Use your Time Machine backup as your start-up drive.

Create a boot drive to install a copy of macOS from.

Use Internet Recovery to reinstall macOS on Mac.

Note: Command R not working? Snow Leopard Recovery mode not working? Try the following methods to reinstall macOS if Recovery won't work.

After your computer finishes starting up, choose the option you want to use from the OS X Utilities menu.

If a window pops up and asks you to enter a password, do as required.

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

Simultaneously press and hold Command and R keys. How to Boot into Snow Leopard Recovery Mode Mac Internet Recovery downloads and starts from a Recovery System image, which provides the same utilities and options as the Recovery System on a startup drive. You can perform a quick test of your memory and hard drive to check for hardware issues. If the startup disk is damaged or replaced, Internet OS X recovery mode is very useful and lets you start your Mac directly from Apple's servers. When the Recovery System on the startup drive isn't available, your Mac will automatically use this feature. Newer Macs have the ability to start up directly from an Internet-based version OS X Recovery. Mac OS X recovery has two modes: standard and internet-based. The standard OS X recovery mode means working on your own computer, while Mac internet recovery mode refers to working from the Internet.

Repair or erase a hard disk or other storage devices with Disk Utility.Check internet connection and get help online using Safari.For Mac Snow Leopard, there is also the Snow Leopard recovery that helps you

Pre-installed into Mac, OS X Recovery is a facility provided by Apple computers that enables you to restore or reinstall Mac OS X without using a physical recovery disk. Full stepsĭownload EaseUS data recovery for Mac. OS X Recovery enables you to restore or reinstall.

Mac os x utilities screen