The name of a new disk will often include the manufacturer’s name (e.g. This disk should not be the same as your startup disk. Before doing anything else in Disk Utility, choose Show All Devices from the View menu, or from the View popup button in Disk Utility's toolbar.Ĭlick to select the disk that you would like to use as the destination for your CCC task. Unfortunately, this hides the devices that you need to select to modify the partitioning of your backup disk. Watch a video of this tutorial on YouTube Show All Devicesĭisk Utility offers a very simplified view of your devices by default. Instructions for Big Sur, Catalina, Mojave, and High Sierra macOS 10.12 Sierra and OS X 10.11 El Capitan.macOS 11Big Sur, 10.15 Catalina, 10.14 Mojave, and 10.13 High Sierra.Choose About This Mac from the Apple menu to determine your current OS, then make a selection below. Be sure you’ve identified the Mac drive - if you accidentally delete partitions from another drive, you could damage your Windows installation or lose your files.The remaining steps vary considerably depending on the operating system you are running. Locate the Mac drive in the list of disks. This tool allows you to manage the partitions on drives connected to your computer - internal ones or external ones connected via USB. Press Windows Key + R to open the Run dialog, type diskmgmt.msc into the box, and press Enter to open it. RELATED: Understanding Hard Drive Partitioning with Disk Managementįirst, open the Windows Disk Management tool.

You’ll probably want to uninstall Java when you’re done.Įrase the Mac Partitions, Including the EFI System Partition

HFSExplorer unfortunately requires you install Java to use it, but it’s the only free option here. If you only have Windows systems available, you can use HFSExplorer to copy files from the drive onto your Windows system drive or another drive. If you have a Mac lying around, you can plug the drive into a Mac and back up the files. Instead, we’ll just be wiping the drive and starting over from scratch.

This process won’t actually convert the file system. First, back up the data on the Mac-formatted drive if you have anything important on it.

Partitioning mac hard drive