![]() It should show up on the left panel under “External”. Step 2: Highlight your external drive and click “Erase”. The quickest way to do this is a simple Spotlight search (click the search icon on the upper right corner), or go to Applications > Utilities > Disk Utility. They might be different if your Mac is on a relatively new macOS version. Note: The tutorial and screenshots below are based on an older version of macOS. How to Format an External Drive for MacĪs explained above, you need to format your drive from NTFS to Mac OS Extended. The problem is that on macOS, you can’t work with files saved on an NTFS drive unless you use a third-party app which usually costs money. What is NTFS? I’m not going to explain here you can read more on Wikipedia. It showed this format: Format: Windows NT File System (NTFS) I then right-clicked the external drive icon on Mac desktop > Get Info. If I wanted to use it with Mac OS or Time Machine backup (which is my intent), I’ll need to format the drive for my Mac. It brought me to a webpage on Seagate’s site, where it clearly indicated the drive was initially set up to work with a Windows PC. ![]() Since I wanted to use it on Mac, I clicked the blue logo with the text “Start_Here-Mac”. When I opened it, the default content was all there. When I connected the Seagate to my Mac, the drive icon showed up like this. I bought a brand new 2TB Seagate Expansion to backup my MacBook Pro before I updated it to the latest macOS. Most External Hard Drives Are Initiated with NTFSĭuring the last several years, I’ve used a few external drives, including a 500GB WD My Passport, 32GB Lexar flash drive, and a few others. How to Partition an External Hard Drive on Mac.How to Format an External Drive for Mac.Most External Hard Drives Are Initiated with NTFS.It's capable of deleted file recovery, formatted data recovery, unreadable, unmountable, and inaccessible drive data recovery, deleted/lost partition data recovery, etc. IBoysoft Mac Data Recovery is able to recover lost data after partition map damage. Step 1: Recover lost data after partition map damage But to avoid important data loss, you should perform data recovery at first. Since Disk Utility can't repair the damaged partition map, you can only format the drive to replace the damaged partition map. How to solve the Fixing damaged partition map error? If the boot sector gets corrupted as a consequence of improper system shutdown, sudden power surge, etc., the storage device will not be mounted with reading and write mode resulting in data loss. The most frequent reason for a damaged partition map is bad sectors, especially the boot sector. ![]() ![]() ![]() FAQs about fixing corrupted partition map Tips to prevent your partition from damages So in this post, we will talk about how to solve it when the "Fixing damaged/corrupted partition map" operation failed in Disk Utility. The operation failed." I have backed up about two-thirds of the data on the drive but the remaining third has some irreplaceable data. This morning I plugged in the drive and got this message: "The disk you inserted was not readable by this computer." I tried Disk Utility First Aid and got this message: "Fixing damaged/corrupted partition map. In Apple support communities, many people complained that they got the error message: Fixing damaged partition map when they tried to verify and repair an unreadable or unmountable drive in Disk Utility. ![]()
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