Here's how you can clean install macOS or OS X on your iMac, MacBook, MacBook Pro without bootable USB drive, external storage medium. Clean Install macOS / OS X Over the Air, Completely. If you're going for just a reinstall over the top of your existing files, simply select re-install Mac OS and let it run. If you're going for a completely clean install (recommended if you're having issues) make sure you have backup of your system first then proceed to use Disk Utility to format your main hard drive (best practice is to call it. 1 day ago The USB-C charger has a foldable plug for easy transport while on the go and works with a variety of USB-C devices, from 13-inch MacBook Pros to iPad Pros —. From Apple's website: 'To create an external OS X Recovery, download the OS X Recovery Disk Assistant application. Insert an external drive, launch the OS X Recovery Disk Assistant, select the drive where you would like to install, and follow the on screen instructions. When the OS X Recovery Disk Assistant completes, the new partition will not.
Install and run Etcher. https://french-torrent.mystrikingly.com/blog/make-your-laptop-android. To write the ISO file to the USB stick, we're going to use a free and open source application called Etcher.After downloading this and clicking to mount the package, Etcher can either be run in-place or dragged into your Applications folder.
Those who still rely on older Mac OS X operating systems, know these still are going strong. There are so many things you can do with past OS X — like Lion, Mavericks or Yosemite — each one of these operates flawlessly. So if you're looking to give your Mac a fresh start with just a classic Mac OS X and nothing else, to clean install Mac OS from USB is the best option for you.
To clean install Mac OS from USB, there are three things you should do. First, you should clean up your Mac from the old baggage — system files that have piled up over time. Once it's all cleaned up, the next you should do is backup your newly cleaned Mac. And finally, after doing a backup, you can clean install OS X of your choice from USB.
We've got the steps outlined below, so let's get to it.
Step 1: Clean system junk on your current Mac OS X
Whatever OS X you are currently on, system junk and outdated cache files are a potential source for software conflicts. Having cleaned them up, you may discover around 35 GB of newly created space previously taken by junk. What's more, old caches may interfere with your new Mac OS X installation, so this step is pretty essential.
Cleaning can be done either manually or using a dedicated app. If you don't want to spend the next 20 minutes on repetitive clicking and typing, jump right to the automatic solution further down.
The manual way to remove old user caches:
- Click on a Finder window and choose 'Go to Folder' in the Go menu.
- Type in ~/Library/Caches and click Enter to go open the folder.
- Go through each of the folders and remove their contents.
Note: Do not remove the folders themselves, just their insides.
Next off, do the same steps, but now replace.
~/Library/Caches with… /Library/Caches
Mojave requirements macbook air.
Automatic solution for system junk cleanup
There are many nice apps that offer a quick Mac clean up. Among those, CleanMyMac 3 is our favorite as it looks most user-friendly of all. It scans your hard drive for old caches, broken apps, and app leftovers so you can remove all unwanted files in a minute or two. After all, a newly installed OS X feels better on a clean computer.
Download CleanMyMac and then follow the steps:
- Launch CleanMyMac 3.
- Click Scan.
- Click Remove.
And you're done. If you want to clean up more junk on your Mac, go through each of the modules located on the left panel of the app. It'll help you clear out gigabytes of junk that you probably didn't even realize were there. Once you've finished the cleanup, head to the next step.
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Step 2: Back up your Mac
Before you begin to reinstall Mac OS from USB, you should back up your Mac. Note: If you don't do this step, you will not be able to recover files, nor restore anything if something goes wrong. To back up your Mac:
- Open an app called Time Machine.
- Click 'Select Disk.'
- Select where you wish to save your files (an external drive works best, Apple Time Capsule is a safe bet).
- Click 'On' on the left-hand side of the screen to turn Time Machine on.
- On the right, under the name of the storage device, there are three lines that say, 'Oldest backup,' 'Latest backup,' and 'Next backup.' Your backup should be scheduled within the next 5 minutes.
- Don't want to wait? In the menu bar at the top of your screen, a few icons left of the Date & Time, click on the 'arrow clock' icon and select 'Back Up Now.'
Step 3: Installing Mac OS from USB
Animal crossing wild world play. You will need 3 essential things:
- The OS X Installer (downloaded from the App Store)
- The backup of your old system
- Startup drive to install OS X on
Once it's all prepared, it's time to clean install OS X. But first, you need to create a bootable drive using a USB containing Mac OS X of your choice. Don't know how? Then read on.
How to create a bootable USB flash drive
1. Connect your Mac to the USB flash drive. It should have at least 12 GB of available storage.
2. Open Terminal from the Utilities folder of your Applications folder.
3. Type or paste the following commands in Terminal:
Mavericks:
Yosemite:
El Capitan:
4. Press Return.
5. Microsoft or macbook. Type your administrator password and press Return.
6. When prompted, type Y to confirm that you want to erase the volume and press Return. You'll see the progress as the bootable installer is created.
7. Quit Terminal when the process is finished.
How to install the OS from USB
1. Plug in your bootable USB drive and Restart your Mac while holding the Option key. Make sure to keep it pressed down!
2. Step software download. When it restarts, you'll have a few options. Choose your USB Installer.
3. Next, select the Disk Utility option.
4. In the window, at the top of the left bar, select your Mac's Main Drive.
5. Next, to the First Aid button at the top, click the Erase button.
6. Now, near the center of the window, select the Format drop-down list and select 'Mac OS X Extended (Journaled)' as the type.
7. Click Erase (this will erase your main drive) and allow time for the drive to format.
8. When it's finished, close out DiskUtility and select 'Install OS X' from the menu.
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9. Select your main drive and install a new OS X on it.
Follow the installation prompts and enjoy your new operating system. And if you want your new OS works smoothly for a long time to come, use a great cleaning and maintenance tool we've mentioned above — CleanMyMac 3. The app will take care of your Mac, so you'll get the most out of your computer again. Try it now!
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These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.
Download macOS
Find the appropriate download link in the upgrade instructions for each macOS version:
macOS Catalina, macOS Mojave, ormacOS High Sierra
Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Important: To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
OS X El Capitan
El Capitan downloads as a disk image. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.
Use the 'createinstallmedia' command in Terminal
- Connect the USB flash drive or other volume that you're using for the bootable installer. Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended.
- Open Terminal, which is in the Utilities folder of your Applications folder.
- Type or paste one of the following commands in Terminal. These assume that the installer is still in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace
MyVolumein these commands with the name of your volume.
Catalina:*
Mojave:*
High Sierra:*
El Capitan: - Press Return after typing the command.
- When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
- When prompted, type
Yto confirm that you want to erase the volume, then press Return. Terminal shows the progress as the bootable installer is created. - When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Catalina. You can now quit Terminal and eject the volume.
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* If your Mac is using macOS Sierra or earlier, include the --applicationpath argument, similar to the way this argument is used in the command for El Capitan.
Use the bootable installer
After creating the bootable installer, follow these steps to use it:
- Plug the bootable installer into a compatible Mac.
- Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to macOS Recovery.
Learn about selecting a startup disk, including what to do if your Mac doesn't start up from it. - Choose your language, if prompted.
- A bootable installer doesn't download macOS from the Internet, but it does require the Internet to get information specific to your Mac model, such as firmware updates. If you need to connect to a Wi-Fi network, use the Wi-Fi menu in the menu bar.
- Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.
Learn more
For more information about the createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal:
Catalina:
Mojave:
High Sierra:
El Capitan:
