Before you can access a new or formatted drive in your operating system, you need to initialize it first and then create a partition on the drive. A partition defines an area of the drive to use for storing data. The partition uses a file system (for example, HFS+, ex-FAT, NTFS, and so on).
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Initialize a drive
Installing Big Sur. Now that we have our new partition created, we’re ready to install macOS Big Sur. At this point in the installation process, you should be at the screen where you need to select which hard drive to install on. This is where we select our newly created Macintosh HD Beta partition. To complete the install, perform the. How to install a new copy of macOS Big Sur in Recovery Mode Recovery Mode is the special salvation of the Mac that first launched with OS X 10.7 Lion. It creates a temporary boot partition that allows you to access certain things on your computer that you might not be able to if your system froze or crashed. Mac users may occasionally find themselves wanting to clean install macOS Big Sur onto a Mac. A clean installation of macOS Big Sur basically means the entire hard drive – including the system itself, all data, all apps, user accounts, literally everything – is erased, and then a fresh clean install of macOS Big Sur is installed onto the Mac. Instructions on the install disk told me to hold down the C key as the computer starts up but that doesn't work. The tech at Micro Center said the new hard drive had been partioned to accept the OS X install disk but I'm not so certain now. I haven't tried a PRAM reset but I'm off to try it now. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions. Learn more A bootable installer doesn't download macOS from the internet, but it does require an internet connection to get firmware and other information specific to the Mac model.
Mac OSX detects a drive that needs to be initialized and automatically prompts you to initialize the drive. If you are prompted to initialize the drive, click Initialize. If you are not prompted to initialize the drive and you cannot find the drive in Finder, you will need to create a partition on the drive.
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Create a partition on a drive
Note: The following steps create an HFS+ (Mac OS Extended (Journaled)) partition that uses the entire drive space.
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To create a partition on a new drive, complete the following:
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Navigate to Applications and click Utilities.
Open Disk Utility.
Select the new drive and click the Partition tab.
Click Options and verify that it is set to GUID Partition Table.
Enter a name for the partition.
The drive should now be accessible in Finder.