When you plug your external hard drive into your Mac computer’s port you can clearly see the drive mounted on the desktop of your computer screen. You can easily transfer data or copy the contents between your Mac and this external storage device.
However, sometimes MacBook not detect external hard drive fails to show the data. The reason could be anything but you can fix it using the right troubleshooting steps listed below. This process can be applied on all Mac devices including MacBook Air, Pro and iMac etc.
Step1: Before you do anything make sure Mac your computer is set to show the mounted external drives on your desktop. To check go to Finder>Preferences> and make sure that external drive is enabled with tick on checkbox.
Step2: This could be very common or human error called if you have not properly plugged into the port because if it is not inserted properly it will not get enough power and if you are using USB cable also check adapter working properly or supplying the power or not.
Step3: When MacBook not recognizing external hard drive it could be also owing to USB port or cables related issues. So, check the entire cable and make there is not faults or cuts. Similarly also check the USB port on your Mac machine is working properly. You can plug other USB cables or plug your external hard drive USB cable into another USB port.
Step4: Apart from this you can also try other things like access your external drive with other computer, as may be the drive is formatted for PCs and your Mac is not reading this drive. You can also open Apple Disk Utility program to see the hard drive is visible there or not. At this moment if you need help, call Macbook Technical Support for online help.
Step5: Another indication is that, if volume listed on your Mac is not accessing the drive the mount option will be appeared grayed. Here you have choices to Erase, First Air or Restore. Erase will delete all date, First Air will check disk error and repair while restore option will delete the contents of the drive and replace with volume from another drive.
Step6: However, if due to any reason you can’t try First Aid then, click “First Aid” tab and select run. If after running the first aid Mac finds errors fix the same using Repair Disk option. And if your Mac is not able to repair the disk due to formatted drive using the file system that Mac not able to read or it is damaged. At this stage you need help, so immediately call at MacBook support phone number and get online support for such issues
Step7: MacBook not reading external hard drive could be result of formatted drive and types of bit of background on file formats. Actually, different OS uses different formatting techniques, Mac computers prior to Sierra version, use the HFS+ file format while Windows PCs use NTFS file format. Though, to make this matter more complicate Apple has introduced a new file system called Apple File System (APFS). However, formatting with this process the drive can be readable by Window and all Mac computers.
Nevertheless, if you find the hard drive is formatted using a different file system you need to check or access the data on the drive. To do that just connects your drive to a computer that can recognize it and can copy all the data before moving the step on your system. However, if you don’t need the data on thee hard drive just click one erase and your Mac computer will be completely formatted and if you need any help get in touch with Apple Mac customer support.