Reinstall from macOS Recovery
Please note: Monster Mac is a virtual restaurant exclusively available via third-party delivery apps only, and menu offerings may differ slightly depending on market availability.Consuming raw or under-cooked meats, poultry, seafood, shellfish, or eggs may increase your risk of food-borne illness. Navigate to the Applications folder on your Mac, and then to the Utilities folder. Within that is a programme called Boot Camp. It will now ‘partition’ your hard drive – this essentially means split it between Windows and Mac.
macOS Recovery makes it easy to reinstall the Mac operating system, even if you need to erase your startup disk first. All you need is a connection to the Internet. If a wireless network is available, you can choose it from the Wi-Fi menu , which is also available in macOS Recovery.
1. Start up from macOS Recovery
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following sets of keys on your keyboard. Release the keys when you see an Apple logo, spinning globe, or other startup screen.
Command (⌘)-R
Reinstall the latest macOS that was installed on your Mac (recommended).
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Option-⌘-R
Upgrade to the latest macOS that is compatible with your Mac.
Shift-Option-⌘-R
Reinstall the macOS that came with your Mac, or the closest version still available.
You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
When you see the utilities window, you have started up from macOS Recovery.
2. Decide whether to erase (format) your disk
You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase. If you need to erase before installing macOS, select Disk Utility from the Utilities window, then click Continue. Learn more about when and how to erase.
3. Install macOS
When you're ready to reinstall macOS, choose Reinstall macOS from the Utilities window. Then click Continue and follow the onscreen instructions. You will be asked to choose a disk on which to install.
Downloading apps requires an Apple ID. Pages for Mac, Numbers for Mac, and Keynote for Mac are available on the Mac App Store. MacOS Catalina or later required. Some features may require internet access; additional fees and terms may apply. ![Downloading pages for mac](/uploads/1/3/4/3/134348515/414311600.png)
![Downloading pages for mac](/uploads/1/3/4/3/134348515/414311600.png)
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
- If the installer is for a different version of macOS than you expected, learn about macOS Recovery exceptions.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
Please allow installation to complete without putting your Mac to sleep or closing its lid. During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
If your Mac restarts to a setup assistant, but you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
macOS Recovery exceptions
The version of macOS offered by macOS Recovery might vary in some cases:
- If macOS Sierra 10.12.4 or later has never been installed on this Mac, Option-Command-R installs the macOS that came with your Mac, or the closest version still available. And Shift-Option-Command-R isn't available.
- If you erased your entire disk instead of just the startup volume on that disk, macOS Recovery might offer only the macOS that came with your Mac, or the closest version still available. You can upgrade to a later version afterward.
- If your Mac has the Apple T2 Security Chip and you never installed a macOS update, Option-Command-R installs the latest macOS that was installed on your Mac.
- If you just had your Mac logic board replaced during a repair, macOS Recovery might offer only the latest macOS that is compatible with your Mac.
If you can't get macOS Recovery to offer the installer you want, you might be able to use one of the other ways to install macOS.
![For For](/uploads/1/3/4/3/134348515/803431743.jpg)
Other ways to install macOS
- You can also install macOS from the App Store or Software Update preferences. If you can't install macOS Catalina, you might be able to install an earlier macOS, such as macOS Mojave, High Sierra, Sierra, El Capitan, or Yosemite.
- Or create a bootable installer disk, then use that disk to install macOS on your Mac or another Mac.
This article is intended for system administrators who set security policy in enterprise environments that require smart card authentication.
macOS includes a modern architecture that supports smart cards. This architecture is based on the CryptoTokenKit framework, which supports authentication, encryption, and signing functions, plus MDM controls for managing smart cards within Enterprise environments. Starting with macOS Catalina, legacy smart card support that uses TokenD will be disabled by default.
Before you upgrade to macOS Catalina
If you want to migrate from legacy TokenD to modern CryptoTokenKit-based smart card services after upgrading to macOS Catalina, follow these steps:
![Mac Mac](/uploads/1/3/4/3/134348515/230374863.jpg)
1. Make sure that any third-party apps that you use support CryptoTokenKit.
Prepare Mac For Service
2. Verify that
com.apple.CryptoTokenKit.pivtoken
doesn't appear in the output of this Terminal command:defaults read /Library/Preferences/com.apple.security.smartcard DisabledTokens
If it does, you can remove the PIV token from the DisabledTokens array by deleting the entire array:
Apache mac os x catalina.
defaults delete /Library/Preferences/com.apple.security.smartcard DisabledTokens
Prepare Mac For Sale
3. If you've installed a driver that relies on TokenD, use the developer's instructions to uninstall it.
Prepare For Mac Trade In
If you have any issues using your smart card after upgrading to macOS Catalina, pair the card again. For additional instructions on configuring smart card services, see the macOS Deployment reference and the
SmartCardServices(7)
man page.