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Reinstalling Lion Restart your computer, and immediately hold down command-r until the gray Apple logo appears. If prompted, select your main language and then click the arrow. Click Reinstall OS X, and then Continue.
How do I reinstall OS X Lion without CD?
Reinstall Your Mac’s OS Without an Installation Disc Turn your Mac on, while holding the CMD + R keys down. Select “Disk Utility” and click on Continue. Select the startup disk and go to the Erase Tab. Select the Mac OS Extended (Journaled), give a name to your disk and click on Erase. Disk Utility > Quit Disk Utility.
How do I factory reset my Mac OS X Lion?
OS X 10.7 (LION) OR LATER Restart your Mac and hold down the Command + R keys until the Apple logo appears. From there, you’ll see an OS X Utilities window with the aforementioned options listed. Select Disk Utility and erase your HD, just as instructed to do in the first section of this article.
How do I reinstall OS X Lion from USB?
How To Create an OS X Lion USB Installation Drive Download Lion through the App Store. Find the downloaded App package in Finder, right or control click it and select “Show Package Contents” In the Finder window displaying the package contents select the Contents folder, then the SharedSupport folder.
How do I reinstall OSX without disk?
How to use Internet Recovery to reinstall macOS Shut down your Mac. Hold down Command-Option/Alt-R and press the Power button. Hold down those keys until you a spinning globe and the message “Starting Internet Recovery. The message will be replaced with a progress bar. Wait for the MacOS Utilities screen to appear.
How do I reinstall OSX without Internet?
Installing a fresh copy of macOS via Recovery Mode Restart your Mac while holding down the ‘Command+R’ buttons. Release these buttons as soon as you see the Apple logo. Your Mac should now boot into Recovery Mode. Select ‘Reinstall macOS,’ and then click ‘Continue. ‘ If prompted, enter your Apple ID.
How do I recover OSX?
Reboot your Mac. Hold down Option/Alt-Command-R or Shift-Option/Alt-Command-R to force your Mac to boot into macOS Recovery Mode over the internet. This should boot the Mac into Recovery Mode.
How do I reinstall Mac from scratch?
Restart your Mac. Choose Apple menu > Shut Down, press and hold the power button until “Loading startup options” appears, select Options, click Continue, then follow the onscreen instructions. In the Recovery app window, select Reinstall for your macOS release, click Continue, then follow the onscreen instructions.
Does reinstall macOS erase data?
Reinstalling macOS from the recovery menu does not erase your data. However, if there is a corruption issue, your data may be corrupted as well, its really hard to tell.
What do I do if I can’t reinstall OSX?
First, completely shut down your Mac via the Apple Toolbar. Then, hold down Command, Option, P, and R buttons on your keyboard as you restart your Mac. Continue to keep these buttons held until you hear the Mac startup chime twice. After the second chime, let go of the buttons and let your Mac restart as normal.
Can I completely wipe my Mac?
You can wipe your Mac computer — or, in other words, factory reset it — through the macOS Utilities menu. This is a good plan if your Mac is malfunctioning, or you’re looking to sell it. Doing this will wipe all of your personal data and applications. It’ll be like you just turned on your Mac for the first time.
How do I reinstall OSX base system?
How to reinstall macOS while in Recovery mode Click Reinstall macOS. Click Continue. Click Continue. Click Agree. Click Agree. Click on the drive on which you wish to install macOS. Enter your Apple ID and password if you’re asked to, though you might not be. Click Install.
Can you install Mac OS from USB?
Use an external drive or USB to install a fresh copy of macOS. Using an external drive, you can install or reinstall the Mac operating system on a supported device. Apple recommends only system administrators follow these steps since a bootable installer isn’t necessary to update or even reinstall macOS.
Why is my Mac in recovery mode?
You’ve gone into Mac Recovery Mode because there’s a problem, and that typically means a drive problem. In which case, the first thing you need to do is run Disk Utility. It typically can’t repair the disk your Mac has currently booted from, but that’s why you’ve booted into this Recovery HD.
How do I reinstall Mac OS when startup volume is deleted?
How to reinstall macOS when the startup volume was erased? Turn on your Mac and immediately press and hold Command (⌘)-R. Enter a password, such as a firmware or admin password, if prompted. Choose Reinstall macOS from the Utilities window. Click Continue and follow the onscreen instructions.
What is additional component?
Additional Component means a component which is diagnostically useable or therapeutically active alone or in a combination which does not require Compound, and such component does not contain Compound.
What are MacOS versions?
Here’s the last 10 MacOS names: MacOS 10.14: Mojave- 2018. MacOS 10.13: High Sierra- 2017. MacOS 10.12: Sierra- 2016. OS X 10.11: El Capitan- 2015. OS X 10.10: Yosemite-2014. OS X 10.9 Mavericks-2013. OS X 10.8 Mountain Lion- 2012. OS X 10.7 Lion- 2011.
How do I reimage my Macbook Pro from USB?
Booting Your Mac From a USB Drive Simply plug your created USB drive into an open USB port on your Mac. Power on the system, or restart it if it’s already on. Immediately press and hold the Option (Alt) key on your keyboard when it starts booting. You should now see an option to select your USB drive as a startup disk.
How do I install OSX?
Install macOS Choose Reinstall macOS (or Reinstall OS X) from the utilities window. Click Continue, then follow the onscreen instructions. You’ll be asked to select your disk. If you don’t see it, click Show All Disks. Click Install. Your Mac restarts after installation is complete.
How do I wipe my Mac and start over?
Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. Release the keys after about 20 seconds. This clears user settings from memory and restores certain security features that might have been altered.
What does reinstall macOS mean?
2 Answers. 2. 27. It does exactly what it says it does–reinstalls macOS itself. It only touches operating system files that are there in a default configuration, so any preference files, documents and applications that are either changed or not there in the default installer are simply left alone.
