1. Install Recovery Partition Windows 10
2. Install Os X From Recovery Partition
3. How To Install Os X

There's an easier way, particularly if you only have one computer you want to clean install: When you boot from the recovery partition it allows you to erase the boot drive and reinstall the last installed version of macOS. Jump to How to reinstall macOS while in Recovery mode - Click on the drive on which you wish to install. Enter your Apple ID and password if. Jul 3, 2016 - The Recovery partition in Mac OS X is an important component of a system install in that it allows you to troubleshoot a computer, repair drives,.

Every Mac since the days of OS X Lion has a Recovery partition, a tool that can help you rescue a Mac with a damaged operating system.

However, if you are looking to replace macOS with Linux, you may want to delete this for some extra disk space3 Free Apps to Analyze & Inspect Your Mac's Hard Disk Space3 Free Apps to Analyze & Inspect Your Mac's Hard Disk SpaceWondering where all of your Mac's storage has gone? These free apps will let you know.Read More. You also may want to restore it if you switch back to macOS.

Here’s how to delete or restore your Mac’s recovery partition.

The Basics of the Recovery Partition

When booting up your Mac, you can hold down Command+ R to boot into the Recovery partition of your Mac. If your Mac has a problem, this is your place to access utilities, restore from Time Machine, or as a last resort: get a clean install of macOS.

The main menu offers four options: Restore from Time Machine BackupHow to Restore Data From Time Machine BackupsHow to Restore Data From Time Machine BackupsIt's really easy to set up Time Machine, the backup software that comes with every Mac — but how do you get your files back when things go wrong?Read More, Reinstall macOS, Get Help Online, and Disk Utility. These are self-explanatory, though to look online for help or reinstall macOS, you need to connect your Mac to the internet.

There are additional utilities that aren’t listed but available in a menu item: Firmware Password Utility, Network Utility, and Terminal. If you are using a Mac made after 2010, you can also boot into a network-only Recovery Mode by holding Option + Command+ R to help if you are having an issue with your local disk booting.

Deleting the Recovery Partition

If you have a USB stick with the latest macOS installerHow to Install macOS From USBHow to Install macOS From USBWant to install macOS from a USB drive? We'll walk you through this alternative method for installing macOS.Read More, and want to get around 650 MB of disk space on your Mac back, then you can delete the Recovery Partition.

Even with a backup installer, you want to make sure that you back up all of your data with something like Carbon Copy Cloner, in case something goes wrong. We are all adults here, and if you are okay working without a safety net you do not need to have the USB Drive per se, but you have been warned.

Note: How you proceed will depend on whether you’re using Core Storage or not, so be sure to pay attention to this next bit. Regardless of what you do, a functional backup is very important when you start messing with partitions as things can and do go wrong.

1. Core Storage and a Dirty Hack

Apple introduced Core Storage as part of the Fusion Drive tech.

As a part of the eventual move away from HFS+, Apple has begun to move partitions to Core Storage volumes during the upgrade process to macOS. I hosed my old 2011 Air twice messing around with the Core Storage partition and ended up having to restore from my Time Machine backup.

You can find out if your system drive was converted to Core Storage by entering the following command into Terminal:

If you see that the command lists your system drive with the type AppleCoreStorage, it is not recommended to go forward. Even the power of Terminal does not deal with these partitions very well, and you can easily end up having to restore your Mac from a backup.

There is a solution, but it is a relatively dirty hack. What you can do is create a clone of your drive externally using Carbon Copy ClonerCarbon Copy Cloner - A Free & Powerful Backup Utility (Mac)Carbon Copy Cloner - A Free & Powerful Backup Utility (Mac)Read More. If you do not already have it installed, download it here.

After that, plug in your USB drive and open Disk Utility. Click on the USB drive and select Erase. Name the drive, and then set the format to Mac OS Extended (Journaled) and set the scheme to GUID Partition Map.

Once you format your disk correctly, open Carbon Copy Cloner. You should be prompted to create your first job, if you are not select New Task from the File menu. Select your Mac’s system drive as the source and your newly formatted system drive as the destination. You can select Done and kick off the copy.

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The wait may vary based on the size of your system, so you may want to make some coffee or tea while you wait. When it is complete, shut down your Mac and boot up holding the Option key to select your boot disk. Select your USB drive to boot from, and you should boot into your same system.

Once you are back into macOS, open the Computer folder from Finder and make sure that you eject your Mac’s disk. Then open the Disk Utility. Repeat the steps to erase your system disk with the single partition. Then, reverse the Carbon Copy Cloner job to restore your drive.

When Carbon Copy Cloner asks if you want to include a Recovery Partition, answer No. Now your Mac no longer has the Recovery Partition.

2. Terminal

If your Mac still has an older style partition table, the easiest way to delete your recovery partition is to use TerminalThese 6 Awesome Terminal Commands Will Boost Your MacBookThese 6 Awesome Terminal Commands Will Boost Your MacBookYou can only cram so much into graphical user interface before it becomes cluttered, so it should come as no big surprise that you can do some really cool things using the Mac Terminal.Read More, though your account needs to have admin rights for this to work. Find your Recovery partition using the command:

This command is the Terminal version of Disk Utility, and list gives you a list of all your disks and their partitions. You want to be careful here, as you do not want to delete the wrong partition unintentionally. Look for the partition, probably at the bottom of the list, Recovery HD. You will want to delete this and merge it into your main partition. To do so first delete the partition using the command:

This command deletes the Recovery partition and replaces it with blank space. Make sure that your Recovery HD partition is listed as disk0s3. If it is not, change the command to match your disk. There are now two partitions on the disk: our normal system disk and a new blank partition. For the next step, we need to combine the two, leaving our drive as a single partition. That is a simple command:

This command merges the two preserving all of the data on your system disk. Be sure to double check those volume labels against your own disks to avoid losing data. Even doing everything right when messing with partition tables, something can go awry. Be sure that you are not working without a backup.

You can now list your partitions again and see that your disk is one partition for your system disk and an EFI boot partition. Now that you have your disk how you want it, the challenge becomes keeping it that way.

Restoring Your Recovery Partition

One of the easiest ways to have the Recovery partition restore itself is to update macOS. Unfortunately, that means that it might come back even when you do not want it. If you removed it altogether, this can be problematic.

There isn’t an option when applying updates, so you need to repeat the steps to ensure that you are safe. If you switched to Linux and are using just the hardwareBuying MacBooks For Penguins: Linux on Apple HardwareBuying MacBooks For Penguins: Linux on Apple HardwareYou'd probably think that the free open source operating system Linux wouldn't mix too well with Apple's proprietary, controlling approach when it comes to hardware — but you'd be wrong.Read More, this became a lot easier. You can just delete or ignore macOS and go about your business.

If you’re looking to restore it without having to donwload updates, you may want to repeat the Carbon Copy Cloner steps in the section on Core Storage partitions. Just where it says to select No, select Create Recovery Volume.

Taking Control of your Hardware

As any long time Mac user can tell you11 Quick Fixes for Common Mac Problems and Quirks11 Quick Fixes for Common Mac Problems and QuirksDid you know many of the common Mac issues and quirks that users report can be fixed simply by changing a few settings?Read More, messing around with the deeper levels of macOS is difficult. Removing the Recovery partition is not any different. Make a backup and be careful before trying anything in this article, we would not want you to lose data.

Have you ditched your recovery partition? Tell us why!

Explore more about: Data Recovery, Disk Partition, macOS Sierra, Terminal.

1. Following the instructions carefully (no CoreStorage on my system) and this did not work. In terminal after running this command (diskutil eraseVolume JHFS+ Blank disk0s3) I get the following error:

   Started erase on disk0s3 Recovery HD
   Unmounting disk
   Error: -69874: Couldn't modify partition map

2. hello, how to get the recovery portion back?

   now we have:
   /dev/disk0 (internal, physical):
   #: TYPE NAME SIZE IDENTIFIER
   0: GUID_partition_scheme *1.0 TB disk0
   1: EFI EFI 209.7 MB disk0s1
   2: Apple_HFS Macintosh HD 289.9 GB disk0s2
   3: Apple_HFS Subsidiary 699.7 GB disk0s3
   4: Apple_HFS Recovery HD 10.2 GB disk0s4
   but disk0S4 is visible in Finder and does not contain the recovery HD at all, it was manually edited in terminal after some greater partition issues.

3. Please fix this: merge command lacks partition name before disk0s2 and disk0s3 parameters. For this example:
   diskUtil mergeParitions JHFS+ Guest__OSX disk0s2 disk0s3

4. Hmmm.. Cox and stokes us foreign policy pdf converter. I entered a comment, put in my name and email, clicked 'Post Comment' and my comment disappeared but my name and email remain. Did my comment get sent? I can't tell. So I'm sending this to see if I missed something.

   • Never mind, I see it. I just don't have the patience.. ;-)

5. I have a MBAir with a 128GB drive, MacOS Sierra. DiskUtil shows I have:
   #: TYPE NAME SIZE IDENTIFIER
   0: GUID_partition_scheme *121.3 GB disk0
   1: EFI EFI 209.7 MB disk0s1
   2: Apple_CoreStorage Macintosh HD 120.5 GB disk0s2
   3: Apple_Boot Recovery HD 650.0 MB disk0s3
   This seems to indicate that the actual size of my SSD is 256GB. If I use the CCCloner method shown above and completely erase the SSD, I should then, in theory, have use of a 256GB drive for the cost of a 128GB. Seems logical to me, what do you think?

   The only fly in the ointment I see is that, when I reinstall Sierra, will it create a new CoreStorage partition? Thus leaving me with my original 128GB drive.

   Another thought is that when Apple does finally move from HFS+, they won't need a separate CoreStorage partition, so I could then use that for other purposes. Maybe. We can only hope.

macOS Sierra is Apple's latest desktop operating system, which succeeds OS X El Capitan and adopts a new name to bring it in line with iOS, watchOS, and tvOS. The OS will come pre-installed on all new Macs once current stock is depleted and is a free download for existing Mac owners.
The main new feature in macOS Sierra is deep Siri integration, bringing Apple's personal assistant to the Mac for the first time. It also adds new features to Photos and Messages, and includes Continuity smarts like Universal Clipboard and an Auto Unlock option for Apple Watch owners.
This tutorial explains how to download macOS Sierra and perform a clean install, which offers several benefits over the automatic upgrade process included in the installation package.

Benefits of a Clean Install

A clean install can remove annoying quirks and strange behaviors that your Mac may have inherited over time due to driver upgrades, wonky apps, and messy installation procedures. Performing a fresh install can also reclaim lost disk space caused by junk files left by third-party apps, and can generally make your Mac feel a lot snappier, enabling you to relive that feeling of booting it up for the first time.
To complete the clean install procedure described below, you'll need an 8GB or larger USB thumb drive and an hour or two to spare.
You should also perform a full backup of your Mac beforehand using Time Machine. That way you can restore your system from the Recovery partition if something goes wrong. Alternatively, save a bootable mirror image of your system to an external drive using a clone utility like SuperDuper! ($27.95) or Carbon Copy Cloner ($39.99).

Compatibility Check

Install Recovery Partition Windows 10

Before you do anything, check that your Mac is compatible with Apple's new operating system. macOS Sierra supports the following:

• iMac (Late 2009 or newer)
• MacBook Air (2010 or newer)
• MacBook (Late 2009 or newer)
• Mac mini (2010 or newer)
• MacBook Pro (2010 or newer)
• Mac Pro (2010 or newer)

Another way of checking if your Mac is compatible is to open the Apple menu in the upper left corner of your Mac's screen and selecting About This Mac. Look just below the OS X version number in the Overview tab – if the Mac model name is the same or a later model year than the one shown in the compatibility list above, your Mac is compatible with Sierra.

Pre-Install Notes

If you want total control of what data gets transferred to the new OS, you can sidestep the Migration Assistant and manually copy any important files and folders on your existing system to an external drive instead. It's also worth taking a screenshot of your desktop, to serve as a record of how you like things set up.
Some users may find it useful to make a note of the contents of their Applications folder for later reference. A screenshot may suffice (Command-Shift-4, then Space to capture the Finder window), but if not, the following steps describe a simple way to create a list of apps.

1. Open the Applications folder and press Command+A to select all apps in the Finder window, then press Command+C.
   
2. Now open up TextEdit, create a new document, select Format -> Make Plain Text from the menu bar, and press Command+V to paste a list of app names into the document.
   
3. If necessary, add details of download locations for any non-Mac App Store apps you use, append any serial numbers you might need, and save the text document to an external drive.

Install Os X From Recovery Partition

Be sure to allow any cloud services you use to complete synchronization before continuing. It's also worth screen-grabbing or noting down any custom preferences, settings, Wi-Fi passwords, and app-specific profiles you use.
Lastly, de-authorize any services on your Mac, including your iTunes account (iTunes menu > Store > Deauthorize this Computer), since these are usually limited to a set number of systems.

Create a Bootable Installer

Download the macOS Sierra installation package from the Mac App Store. Once it has downloaded, follow these steps to create a USB bootable installer.

1. Open Disk Utility (found in the Applications/Utilities folder), select the thumb drive in the sidebar and click the 'Erase' button.
   
2. Name the USB drive 'Untitled' if it isn't already, choose the Format 'OS X Extended (Journaled)', and click 'Erase'. Once your thumb drive is formatted and the macOS installation package has finished downloading, open up Terminal (found in Applications/Utilities).
   
3. Now, ensure the USB drive is the only disk named 'Untitled' connected to your Mac, and then paste the following command into the Terminal window, and press Enter: sudo /Applications/Install macOS Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install macOS Sierra.app --nointeraction
   
4. You should be prompted for your administrator password. Enter it, and the command will create a bootable Sierra installer on the USB drive. The process will take a few minutes to complete, so leave it running.

Restart and Install

How To Install Os X

Once the USB installer has been created, restart your Mac and hold down the Option key as soon as you hear the reboot tone. Then follow these steps:

1. Use the mouse pointer or the arrow keys on your keyboard to select the disk called 'Install macOS Sierra' in the drive list that appears on the screen.
   
2. Once the USB drive has booted, select 'Disk Utility' from the Utilities window, choose your Mac's startup drive from the list, and click 'Erase'.
   
3. When your Mac's startup disk is formatted, return to the Utilities window and select 'Install macOS', choose your freshly erased startup drive when asked where to install the OS, and follow the onscreen prompts to complete the installation.

Post-Install Steps

Once the clean installation of macOS Sierra is up and running on your Mac, you can either restore your data from a Time Machine backup using Migration Assistant (found in Applications/Utilities), or begin restoring your apps, files, and settings manually to get your Mac set up just the way you like it.

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