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Start up from macOS Recovery
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Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:
Apple silicon
Turn on your Mac and continue to press and hold the power button until you see the startup options window. Click the gear icon labeled Options, then click Continue.
Intel processor
Make sure that your Mac has a connection to the internet. Then turn on your Mac and immediately press and hold Command (⌘)-R until you see an Apple logo or other image.
If you're asked to select a user you know the password for, select the user, click Next, then enter their administrator password.
Reinstall macOS
Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.
Follow these guidelines during installation:
- 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 offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
- Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
After installation is complete, your Mac might restart to a setup assistant. If 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.
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Other macOS installation options
When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions:
- On an Intel-based Mac: If you use Shift-Option-Command-R during startup, you're offered the macOS that came with your Mac, or the closest version still available. If you use Option-Command-R during startup, in most cases you're offered the latest macOS that is compatible with your Mac. Otherwise you're offered the macOS that came with your Mac, or the closest version still available.
- If the Mac logic board was just replaced, you may be offered only the latest macOS that is compatible with your Mac. If you just erased your entire startup disk, you may be offered only the macOS that came with your Mac, or the closest version still available.
You can also use these methods to install macOS, if the macOS is compatible with your Mac:
- Use the App Store to download and install the latest macOS.
- Use the App Store or a web browser to download and install an earlier macOS.
- Use a USB flash drive or other secondary volume to create a bootable installer.
Finding and accessing opt isn’t as simple as finding other hidden folders. In this article, we explain why and how to find and access the opt folder.
How to find the opt folder?
This isn’t as easy to find as a Library or even Net or var because macOS does not even have an opt (or /opt) folder. Instead, macOS has a /usr/local/opt folder, something you can make visible in Finder.
Ordinarily, you aren't going to need to find and access the /usr/local/opt folder unless you need to download new software applications from third-party providers, such as Intel or Homebrew.
Whatever the format you find opt within your macOS directory, the purpose of this folder is: “a directory for installing unbundled packages (i.e., packages not part of the Operating System distribution, but provided by an independent source), each one in its own subdirectory.”
Navigating to this opt folder can be done one of two ways: either go through Terminal or search for it using Finder.
How to find opt folder using Terminal
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- Go to Terminal - in the Utilities folder.
- Type in the following command:
defaults write com.apple.Finder AppleShowAllFiles YES
- Now Reinitialize the Finder, either by rebooting or clicking the Finder while holding down the Option key, then selecting “Relaunch.”
- Now, this should show every hidden folder, including the /usr/local/opt folder.
- Once you are ready to hide them again, go to Terminal and input the following command:
defaults write com.apple.Finder AppleShowAllFiles NO
How to access the Opt folder using the Finder
- Open Finder.
- Press Command+Shift+G to open the dialogue box.
- Input the following search: /usr/local/opt
- Now you should have temporary access, so you should be able to drag it into the Finder favorites if you want to access it again.
How to visualize all your folders with Space Lens
Space Lens one of the powerful tools in CleanMyMac X. With its help, you can scan your hard drive and build a detailed map of your storage. You'll get a list of all the files and folders on your Mac and how much space they take. You can see what's taking space in a few clicks and remove the space hoggers for good.
- Download and install CleanMyMac X.
- Launch the app.
- Choose Space Lens.
- Click Run.CleanMyMac X is a powerful cleaner, speed booster, and health guard for your Mac. Try it out to keep your Mac as good as new!