Question: How to Install Mac Operating System?

How to install a fresh copy of OS X on your Mac

• Shut down your Mac.
• Press the Power button (the button marked with a O with a 1 through it)
• Immediately press the command (cloverleaf) key and R together.
• Make sure you’re connected to the internet through Wi-Fi.
• Select Install Mac OS X, then click Continue.
• Wait.

How do I wipe and reinstall my Mac?

Select your startup drive on the left (typically Macintosh HD), switch to the Erase tab and choose Mac OS Extended (Journaled) from the Format drop-down menu. Select Erase and then confirm your choice. Quit out of the Disk Utility app, and this time choose Reinstall OS X and Continue.

How do I reinstall Mojave on Mac?

How to install a new copy of macOS Mojave in Recovery Mode

1. Connect your Mac to the internet via Wi-Fi or Ethernet.
2. Click on the Apple icon in the upper left corner of your screen.
3. Select Restart from the drop-down menu.
4. Hold down Command and R (⌘ + R) at the same time.
5. Click on Reinstall a new copy of macOS.