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 I don't want to return the drive yet to be sent another that is exactly the same.Īny help or suggestions would be very appreciated, but please be gentle as I am not an expert:-)Įdit - I did read somewhere that "GPT" is for hard drives over 2TB and this is supposed to be a 2TB one but in reality it's 1863.02 GB.Part 4: How to Prevent External Hard Drive Read Only on Mac Part 1. I have tried other external hard drives(which all work), updating drivers and changing the USB ports and leads. If I right click on the lower "Disk 2" panel I get the same thing. Having looked at various guides, it's suggested either "Assign the drive a letter" or I need to format the drive to NTFS, but as can be seen below, when I right click the top line I get a greyed out options so I cannot do either. It is also listed at the bottom as "Disk 2" It is the top drive but with no letter or format showing. It does however show in Device Manager/Computer Management in Windows XP as below. When plugging in, the computer recognises the drive as a new device but it doesn't show up in "My Computer". I have never had problems with others I have had straight from the box. I have just received a new Seagate External Hard drive.
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