One is for the external hard drive and the other is for Mac. Change settings for Mac recognize an external hard disk in the Finder. If you plan on only using the the external hard drive, select Mac OS Extended as the file system. Hi, I have WD 1TB external hard disk.When i brought this and reformatted NTFS to FAT32 for mac.Backing up my stuffs through time Machine and keeping my personal things also.But after this its not detecting my HP windows 7 lap. Use that as a last resort. In this case, you can show the WD hard drive by changing the preferences: Enable External Hard Drive Visibility Why is the MacBook not recognizing my external hard drive? Fix 3. Mount an external hard drive on Mac. There are some useful fixes to the external hard drive not detected … The external hard drive not showing up problem occurs frequently on Windows PC or Mac, and it could lead to data loss. Try to re-connect it and make sure that the USB port is well-cleaned and the hard drive’s cable is plugged in properly. If your flash drive or external hard drive is not showing up there, go to Finder > Preferences > Sidebar, and under Locations, you need to tick the option "External disks". Therefore, It can supply the power required by the external hard drive. The most common and simplest method to fix the external drive not connecting issue on a Mac system is you haven’t connected the external drive properly to your system. b. Now connect the external hard drive to Windows 8 computer and format it in FAT32 file system. The recognition process of an external device contains two parts – hardware and software. If you plan on using the external hard drive on other devices, select FAT32, or exFAT as the file system. Repair external hard drive by using Disk Utility. When your Mac is not recognizing the external hard drive, use Disk Utility to mount and repair the unrecognized external drive. We summarize four common reasons: Connect your hard drive and follow these instructions: Go to System Preferences > Disk Utility. c. Now you would be able to use the external hard disk on both the computers. If the drive is recognized, copy your entire data from it. a. Connect the external hard drive to your Mac and copy the important data to the Mac PC. Finder is the other access for us to check a connected external drive on Mac. 2. However, the fact is that the WD hard drive is detected by macOS but it is not set to show up on Mac. In that case, use a USB cable with two USB connections. ; If Disk Utility lists the external hard drive in gray, then select your external hard drive from the sidebar. It might be corrupted or became unreadable. Question: Q: MacBook not Detecting External Hard Drive. If your Mac is not recognizing a USB or external hard drive after this, you’ll have to try mounting it manually. Warning: Erasing and reformatting your external hard drive will erase all the contents on your external hard drive. If Mac isn’t automatically recognizing your external hard drive, it’s time to force it to. 1. Also refer to this link: Drives, partitions, formatting w/Mac's + PC's These steps for fixing an external hard drive not recognized on Windows and Mac are suitable for external hard drives of all capacities and manufacturers. Any problems in either of the two parts will end up with the macOS doesn’t detect and recognize the external hard drive. Question: Q: External hard disk not detecting in windows 7 ? In case, your drive fails to show up on any other Mac machines then it seems like the problem lies within the ExFAT drive. Still don’t worry. 4. 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