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#How to reformat macbook pro sierra how to#
Here’s the image file for Sierra How to upgrade to macOS Sierra Jump to Step 4 for the direct link. Unless you created a time machine backup, you’ll. Now go back into the main repair menu by closing the disk utility. First thing you need to do is to select disk utility, select your Macbook’s hard drive and hit erase this may seem redundant but I’ll explain in a moment. But I think its just wiser to get to Sierra as being the best OS for these older MacBook Pro’s which have SATA drives and APFS has issues with SATA (HDD or SSD) Eventually you will see the Macbook’s recovery tools. If you still have the Lion OS installer there is a way to install it by back dating your system so the certificate check passes. So I booted into MacOS X High Sierra with the external drive instead and was finally able to use Disk Utility to reformat the drive with HFS+. Apple is no longer maintaining the older OS certificates so you are doomed trying to re-install Lion from the recovery partition. The version of Sierra I had was before this MacBook Pro was released and wouldn’t boot it. How to create a bootable macOS Sierra installer driveĪpple messed up on the OS installer images certificates so your old image may not work! If you've got an old macOS install image, it will probably stop working today Thats when messed you up with the Lion install. So you’ll need to either download and setup a bootable Sierra OS installer or using Disk Utility wipe your drive down and setup with GUID - APFS Also make sure you delete all of the volumes on your drive. Step 3: As you click on the Erase button, you will see several fields in the section. Step 2: From the left side panel, pick the volume or the drive that you want to format and switch to the Erase tab. It sounds like your system requires Sierra (HFS+) Vs High Sierra (APFS) volume to install. Step 1: Connect the USB drive or external drive to Mac and launch the Disk Utility from Applications.