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Step 2: From the menu, select "Get info." Step 1:In Finder, Right-click on your drive. If you have found that the problem occurred after you switched your drive between two different OS, then you might need to change the permission setting of the external hard drive to fix it. The drive permission would change to "you can read and write."įix 2: Ignore Permissions or Change the Permission of the External Hard Drive Once the process completes, your device would be compatible with your Mac, thus fixing the issue. Step5: Click "Erase" again to begin the reformatting.Step4: Select a reasonable file system and add a name to the device.Step3: On the main window, click on the "Erase" option.Step2: Locate the problematic drive from the list on the left.Step1: Go to the application, then head to Utilities.However, as you know that formatiing will erase all data on your drive, if you get data loss after formatting, please go to Part 3. In case the cause of "Read-Only mode" was an incompatible drive system, you can easily fix it by reformatting the drive to a mac-compatible format. 3 Fixes to External Hard Drive Read Only Mac Inappropriate device formatting: Some external hard drives come with wrong formatting, which results in the "Read Only mode" getting enabled as soon as you mount them. Inappropriate permission settings: Switching the hard drives from one OS to another may result in an unsuitable permission setup, which makes the device suspicious for the Mac thus, it puts it in "Read-Only mode." The file system is "NTFS": "NTFS" is a Windows-oriented file system thus, it is incompatible with your Mac There can be several reasons behind the problem, we will discuss some of them below. The device permissions show, "You can only read.".Unable to delete anything from the drive.Unable to copy anything from the drive to Mac.To figure out whether your external hard drive is in Read Only mode or not, check for the three symptoms: Error Analysis: Why Does the External Hard Drive Show Up as Read Only on Mac
#Cannot reformat wd external hard drive mac how to
Part 4: How to Prevent External Hard Drive Read Only on Mac Part 1.
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