![]() ![]() You might be asked to enter your Apple ID. ![]() Click Erase to begin erasing your disk and every container and volume within it.Disk Utility shows a compatible format by default. Format: Choose APFS or Mac OS Extended (Journaled).Name: Type the name that you want the disk to have after you erase it.Click Erase, then complete these items:.Select the disk that you want to erase.In this example, Apple SSD is the startup disk: The disk your Mac started up from is at the top of the list. The sidebar now shows your disks (devices) and any containers and volumes within them. Choose View > Show All Devices from the menu bar in Disk Utility. ![]() If you're not erasing the disk your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder. Then select Disk Utility from the Utilities window and click Continue. Before continuing, make sure that you have a backup of any files that you want to keep. Even though there is no version of CrystalDiskMark for Mac available at the moment, you can download other programs that can help you test and monitor the speed of your hard drives.Įrasing a disk or volume permanently deletes all of its files. CrystalDiskMark by Hiyohiyo is a free to use HDD benchmarking tool that will help you measure the read/write speeds of your hard drives.Get summary info for multiple items: Select multiple items, press and hold the Control key, then choose File. A separate information window opens for each item. On your Mac, do any of the following: Get individual item info: Select the items, then choose File Get Info, or press Command-I.It supports recovery of data from different type of external drives like pen drive, memory card, memory stick. Download and employ Restore External Hard Disk on Mac software to get back your important files from external USB drive on Mac OS X machines. Restore External Hard Disk on Mac v.1.0.0.25. ![]() Erasing a volume on your disk: In other cases, such as when your disk contains multiple volumes (or partitions) and you don't want to erase them all, you can erase specific volumes on the disk. ![]()
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