You should try to plug the same drive to another Mac and see if it works. Also, use new or different wires to check if they are not damaged. Finally, If you still can't find external drive on Mac, it indicates that either your device is broken or it is formatted using the system which is unreadable for Mac. I wanted to replace the 500GB SATA hard drive in my MacBook Pro with a 750GB disk. I hooked the 750GB up to the MacBook through an external USB - SATA interface. Formatted the 750GB disk, did a clean install of Mavericks and moved a bunch of my stuff across from the 500GB. Could happily boot up the new system on the 750GB disk while attached to. Select Disk Utility from the Utility Menu and click on Continue button. When Disk Utility loads select the drive (out-dented entry) from the Device list. Click on the Erase icon in Disk Utility's toolbar. 3d printer software cura. A panel will drop down. Set the Format type to Mac OS Extended (Journaled.).
I have a 12 inch Macbook that I bought early 2017. it has worked perfectly for little over a year until the last couple of weeks.
every now and then the screen froze and then the Mac restarted with blinking folder with a question mark. after restarting it a couple of every thing worked fine again. it seemed to happen more often when it was charging or it was fully charged. I tried a couple of times to repair the startup disk in the disk utility but that didn't help. I then erased the startup disk and reinstalled the macOS Sierra again but the same problem still occurs.
Anyone who has any idea what it can be and how to fix it?
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Hp officejet pro 6960 scanning software for mac. Disk Utility can find and repair errors related to the formatting and directory structure of a Mac disk. Errors can lead to unexpected behavior when using your Mac, and significant errors might even prevent your Mac from starting up completely.
Before proceeding, make sure that you have a current backup of your Mac, in case you need to recover damaged files or Disk Utility finds errors that it can't repair.
Open Disk Utility
Start up from macOS Recovery, then select Disk Utility from the Utilities window. Click Continue. If you're not repairing the disk your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder.
Locate your disk in Disk Utility
Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility.
The sidebar in Disk Utility should now show each available disk or other storage device, beginning with your startup disk. And beneath each disk you should see any containers and volumes on that disk. Don't see your disk?
In this example, the startup disk (APPLE HDD) has one container and two volumes (Macintosh HD, Macintosh HD - Data). Your disk might not have a container, and it might have a different number of volumes.
Repair volumes, then containers, then disks
For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab.
Macbook Can't Find Startup Disk
In this example, the last volume on the disk is Macintosh HD - Data.
Click Run to begin checking the selected volume for errors.
If there is no Run button, click the Repair Disk button instead.
If the button is dimmed and you can't click it, skip this step for the item you selected, and continue to the next item.
If you're asked for a password to unlock the disk, enter your administrator password.
After Disk Utility is done checking the volume, select the next item above it in the sidebar, then run First Aid again. Keep moving up the list, running First Aid for each volume on the disk, then each container on the disk, then finally the disk itself.
In this example, the repair order is Macintosh HD - Data, then Macintosh HD, then Container disk2, then APPLE HDD.
If Disk Utility found errors that it can't repair
If Disk Utility found errors that it could not repair, use Disk Utility to erase (format) your disk.
Macbook Can T Find Disk
If your disk doesn't appear in Disk Utility
If Disk Utility can't see your disk, it also can't see any containers or volumes on that disk. In that case, follow these steps:
Shut down your Mac, then unplug all nonessential devices from your Mac.
If you're repairing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. Then turn the drive off and back on.
If your disk still doesn't appear in Disk Utility, your disk or Mac might need service. If you need help, please contact Apple Support.