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#Mac sierra clean disk utility install#
#Mac sierra clean disk utility password#
#Mac sierra clean disk utility mac#

This can save quite a bit of time, considering the most recent versions of macOS have an installer size of 12GB.

#Mac sierra clean disk utility install#

I would love to hear from you and appreciate any feedback that you may have.Why Would You Need to Install macOS From a USB?Ĭreating a bootable USB drive and using it to reinstall macOS is a bit of a lengthier process compared to simply updating macOS from the Software Update section of the System Preferences, but it has its benefits.īut creating a bootable USB disk allows you to install or update macOS on multiple systems without having to download the installer on each Mac. If you have a chance to try the steps I have shown above, let me know how they worked for you. There are a few possible reasons that the drive may be locked but the most probable is that it is encrypted by FileVault. That is understandable but as we have shown above there is a simple way to get around the problem by completely erasing the drive while in recovery mode. Final Wordsįinding that your disk is locked while trying to re-install your macOS or install a new macOS can be extremely frustrating and may make you feel like you are ready to give up on the whole process. You can check out the information from Apple support if you would like to find out how FileVault works. Whatever the reason for it being locked, the methods above should allow you to erase the data on the disk and then install your new macOS. Other reasons could have something to do with an improper shutdown of your system, some kind of system process that was taking place and was unable to complete, errors or damage to the data on your drive, or other various reasons. So you could have encryption turned on and not even realize it and this is probably why the disk is showing that it is locked.

#Mac sierra clean disk utility password#

Once you enter your password when you log in, FileVault does the rest. The encoding and decoding take place behind the scenes so you usually don’t even notice it.

#Mac sierra clean disk utility mac#

On Mac computers, this is done with FileVault. It also prevents others from easily logging into your computer.Įncryption means that the data on the drive is encoded in a format that can only be read after a password is entered and then decoded. Drive encryption is meant as a security measure so that someone else can’t get a hold of your drive and read the data from it. The first and most common reason is that the drive has been encrypted. There are many reasons this could happen. The frustration caused by the drive being locked and the need to get your operating system installed has probably led to you asking the question or just wondering why the drive is locked or how it got locked in the first place. After you have done the initial set up you can then load the data or files you backed up back onto the machine and you can also download and install any apps you want to put back. Once these steps have been completed your MacBook should be back to its original factory settings. Step 4: Once completed your system will restart, follow the initial setup process to get macOS configured on your machine. Step 3: Follow the instructions on your screen which will walk you through the process. Select Options, click Continue and follow the instructions you see on the screen. Once it is completely powered down, hold down the power button until you see the message Loading Startup Options.

Method 1 (Apple chipset): Shut down your Mac.

If one method does not work, just try the other. You don’t have to find out which one your is if you don’t want to. There are two different ways to do this depending on the chipset your Mac has. Step 2: Start your Mac in macOS Recovery mode. Step 1: Back up your hard drive if you wish to keep the data currently on it. If you are ready to get started, just follow the steps below: The procedure we are going to use below will completely erase all data on the drive and you will no longer have access to it. You will have a clean formatted disk without any garbage on it that will probably perform better.ĬAUTION: If you do already have your own data on the drive and need to save anything, make sure you backup your hard drive first. Whatever the reason may be, it doesn’t really matter, the best way to proceed is to use the Disk Utility to erase the disk and start over fresh. You may have a used Mac that you bought or someone gave to you and you don’t know the password, you may have forgotten your password or other possible reasons. There are numerous reasons why your disk may be locked and the installer is not letting you re-install your macOS.