How do I reinstall my Macbook Pro without the disk?

Restart your Mac. Choose Apple menu > Shut Down, press and hold the power button until “Loading startup options” appears, select Options, click Continue, then follow the onscreen instructions. In the Recovery app window, select Reinstall for your macOS release, click Continue, then follow the onscreen instructions.

Table of Contents

How do I download the full installer of OSX?

Downloading Mac OS X Installers from App Store “Purchases”

Open the App Store.
Go to the “Purchases” section (newer App Store versions must go to Account > Purchases)
Scroll down the list of Purchased items to locate the Mac OS X Installer version you wish to re-download, then click on the download button.

Where can I get macOS installer?

You can find the latest version of the macOS installer by searching for it in the Mac App Store. Although older versions of the macOS installer are also located on the App Store, they don’t turn up from a normal search.

Do I need a disk to reinstall macOS?

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. If the installer offers you the choice between installing on Macintosh HD or Macintosh HD – Data, choose Macintosh HD.

How do I install Mac without Internet?

After downloading Lion you must first save the Install Mac OS X Lion application. After Lion downloads DO NOT click on the Install button.
Get a USB flash drive that is at least 8 GBs.
Locate the saved Lion installer in your Downloads folder.
Plug in your freshly prepared USB flash drive.

How fresh install Mac from USB?

A back up, just in case something goes wrong.

Step 1: Format the external drive.
Step 2a: Get the macOS install file.
Step 2b: Get the install file for an older version of macOS.
Step 3: Create a bootable USB disk.
Step 4: Wipe your Mac.
Step 5: Install macOS.