If Autoplay is disabled, use Windows Explorer to open the HPSimpleSave drive. The Driver Detected A Controller Error On Device Harddisk2 Dr2 as faulty.Most of us believe that our digital devices such as Macs, PCs, and smartphones should be working whenever we need them, so when we are stuck in a situation where those devices suddenly stop being ready it could be very stunning and frustrating.If Autoplay is enabled, click Open folder to view files on the Autoplay menu. Sometimes Mac won't boot from USB as expected.Properly connecting a SATA hard disk drive: Locate the signal cable that came. In the window that opens, click on System Report You should be able to see this: How to Fix Mac Won't Boot from USB Drive. Step 3: To check whether your Mac has booted into Recovery Mode, click on the Apple logo on the top left and then on About this Mac.Get the drive showing up on a Windows PC, try plugging it into a Mac.We have even much bigger question marks in our heads. One of the non-booting Mac errors is that the Mac ends up with a question mark on the screen.External hard drives back up your most important files, but what happens when they. Double-click the HP SimpleSave file to launch the backup software.Especially when our Mac for work stopped starting up without a warning.
![]() ![]() Unable To Find For This Platform Hard Drive Cable Update Or ANext you need to reboot the failed Mac by pressing down T key before the computer chimes. Use the Target Disk ModeThis method will need us to connect this trouble-maker Mac to another compatible healthy Mac using FireWire or Thunderbolt cable. If we proceed directly to the fixes, those fixes may check or format the hard drive, which could cause permanent data loss.There are two effective ways to restore Mac files. How to Save the Files on the Unbootable Mac?Why do we need to get the files off the Mac’s hard drive before fixing the error? In fact, our important working documents are still safe on Mac’s hard drive, but it takes a little bit effort to restore them. This happens more often after a software update or a major OS upgrade.Even though the error looks concerning, we are capable of repairing it and, most importantly, rebooting the Mac and keeping our files safe.![]() Select Startup Disk through clicking Apple logo and System Preferences. Then release the keys until you see the Apple logo. Reboot the Mac and press down Command + R keys before the Mac starts up. By selecting one and click Continue.The other way is to reboot the Mac to Recovery Mode and select the startup disk from there. Then we will see the startup volumes which contain an operating system on the screen. Solution 1: Select the Startup Disk ManuallySince the Mac fails to choose a startup disk, we can help the Mac to choose one by manually selecting it.One way to do it is to reboot the Mac and press down the Option key before the Mac starts up. Then select Disk Utility in the list. But some may not know how to use it to repair the startup disk.We need to reboot the Mac to Recovery Mode. Solution 2: Repair the Errors on Startup DiskAs a Mac user, we might all know that First Aid in Disk Utility can help us check and repair errors on external drives. Select the startup disk and use Erase to reformat it. Reformatting the hard drive and reinstall macOS will be the last solution we can try on our own.Reboot the Mac into Recovery Mode again and choose Disk Utility again too. Solution 3: Reformat the Hard Drive and Reinstall macOSIf First Aid can’t repair the startup disk, it means the corruption is beyond First Aid’s repairing capability. If First Aid successfully fixes the errors, you can restart the Mac again to see it boots up correctly. Pc emulator for running mac os x 10 2015If the Mac is not booting up with another error, here is an overall article covering all possible errors and solutions about Mac not turning on issue. ConclusionWhen the Mac is stuck on a flashing folder with a question mark, don’t panic and try to turn on and off your Mac multiple times in case severe damages could be done to the hard drive. Follow the onscreen wizard to finish the reinstallation. After that, go back to macOS Utilities (or OS X Utilities for older OS versions) window and choose Reinstall macOS (or Reinstall OS X).
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