These are the commands: sudo chflags 0 /volumes/. sudo chmod a+rx /volumes/. Dec 26, 2017 Step One: Boot From Recovery Mode, or an Installer. RELATED: 8 Mac System Features You Can Access in Recovery Mode. Your Mac’s Recovery Mode is. Step Two: Securely Wipe Your Hard Drive (Optional) Step Three: Reinstall macOS.
If you've encountered a problem with macOS, the solution might be to reinstall the system on your Mac. This can be done by any Mac owner, but it can be a little bit complicated. You'll need to put your Mac into macOS Recovery, which gives you tools to diagnose problems on your Mac, as well as reinstall the operating system.
Here's how to reinstall macOS using Recovery mode.
Entering macOS Recovery
macOS Recovery has tools at its disposal that allow you to diagnose problems with your Mac's hard drive, reinstall macOS, and restore from a Time Machine backup. You can enter Recovery by pressing certain key combinations. The combination you choose will determine which version of macOS will be installed on your system when you select Reinstall macOS.
How to check your startup disk with Disk Utility in macOS Recovery mode
The first thing you'll want to do is make sure your Mac's startup disk is healthy. You'll need to use Disk Utility to do that.
How to erase your startup disk in macOS Recovery mode
If you need to start completely fresh, then you'll want to erase your startup disk using Disk Utility. If you want the content on your Mac to stay intact, skip to the next section.
How to reinstall macOS while in Recovery mode
The next step is to reinstall macOS.
Your Mac will now go through the normal macOS installation process, eventually restarting. If you're starting from scratch, you'll need to set up your Mac from scratch.
Questions?
If you have any more questions about reinstalling macOS on your Mac, let us know in the comments.
Updated December 2019: Everything is up to date through macOS Catalina.
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Jun 08, 2020 • Filed to: Solve Mac Problems • Proven solutions
Recovery HD, is a hard drive partition on the hard drive of Mac. It can be accessed by rebooting the Mac and then pressing down the Command+R keys. Mac OS X Lion and above include the Recovery feature which can be used to reinstall the operating system, repair the hard disk or restore the system from a backup. To enter the recovery mode, press command+r key when the system reboots, keep holding them down until the Apple logo appears. The recovery mode has a desktop with an OS X menu bar and an OS X Utilities window with the options listed above. You can then choose your desired option from the utilities window or the utilities menu depending upon your requirement. Here we outlined about the useful function of recovery HD and how to restore Mac with the help of recovery HD. What's more, when users could not fix issues with recovery HD, there is still a way to recovery data on Mac.
Mac Os Reinstall Hard Drive Locked Windows 10Part 1: What recovery hd could help you to do
As mentioned earlier, Recovery HD contains essential diagnostic and troubleshooting tools which help users fixing his Mac if anything goes wrong. The Recovery HD has the following features:
1. Restore Mac from Time Machine
Time Machine has a unique backup feature in the OS X. Time Machine keep a track of how your Mac performed on a particular day so that users can restore Mac to any desired day in the past. Time Machine keeps backup of a day, a week and even a month but when the backup drive becomes full, the oldest backup will be deleted to make more space for the new backups.
2. Repair Hard drive
Disk utility is one of the main options offered in the recovery mode. This feature can be used to repair the hard drive of your Mac once you select the “Repair Disk” option. recovery hd will also let you search for troubleshooting info over the internet as well as remove the contents of the hard drive and restore it from a Time Machine back up.
3. Install/uninstall Mac OS X
This is also a great feature provided by the Recovery HD. Using this feature you can download your desired version of the OS X over the internet without requiring any kinds of optical disk. But obviously, for this method to work, you need to be connected to the internet.
Part 2: How to Restore Mac with the help of Recovery HD
To restore Mac with the help of Recovery HD, follow these steps:
Related: Further read and know more methods on restoring Mac.
Part3: How to Troubleshoot Recovery HD Problems
Recovery HD’s aim is to help users get the solutions from different troubleshooting by OS X. But what happened if you cannot find any solutions from the Recovery HD itself? Well, one thing that you shouldn’t really do is panicking. This article takes into account some common problems with recovery HD itself and tells you how to take care of them in the following lines.
1. Recovery HD is Locked
Recovery HD can get locked sometimes which is indicated by the appearance of an error message that says, “Hard Drive locked”. To get rid of this problem, simply go to disk utility, click on the hard drive then click 'enable journaling' to unlock the drive.
2. Recovery HD doesn`t Show up
Recovery HD does not show up if you have formatted your entire hard drive. To bring it back, you will need to have a Time Machine backup of the data from your hard drive before the formatting happened. Restoring the OS from that backup will get you your OS back while to get the Recovery HD back you will need to run a minimal install of your OS using a setup from the internet or a disk. It will bring back the recovery hd to your Mac.
Mac Os Reinstall Hard Drive Locked Windows 8
We recommend a Mac hard drive recovery software for you, once you did not backup data from hard drive before you restore Max os or you can not restore Mac with the help of recovery HD. Recoverit data recovery for Mac, it can help you recover lost or deleted files from Mac quickly, safely and thoroughly. It supports recover lost, deleted, formatted data from Mac hard drive as well as from USB drives, external hard drives, and other storage devices.
What's Wrong with MacReinstall Mac Os X From Usb
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