If I try to change the start up disk I am only given the option of of the osx installation cd or a network startup. See your Mac Owner’s Manual (or Google for instructions) on to remove and install RAM. The startup disk is the main hard drive on your computer: the one that stores macOS and all your data. If that doesn’t work, an Archive & Install may be needed. Connect an external hard drive to your Mac, 3. Sometimes a Mac will power on but the hard drive will squeal, whine very loudly or make ticking sounds. Repeat for each DIMM in succession until you find the culprit. I’m having trouble figuring out what I should do to get our laptop running again. It not only loads the operating system but also is responsible for storing data. If the internal hard disk drive is not found by Mac, booting Mac to Safe Mode can check the errors in the directory of your internal hard drive. —– Software now dominates the startup process. Below are a few ways to fix a MacBook Pro that can’t mount its startup disk: Sometimes, restarting your Mac is more than enough to fix the problem. This software supports macOS Catalina/Mojave/High Sierra/Sierra and OS X 10.11/10.10/10.9/10.8/10.7. Presented in your native language, or something close. In such a case, you’ll have to turn to Mac SSD data recovery by booting your Mac in the Recovery Mode through Disk Utility. When you see a "Safe Boot" message on the startup window, you can restart the Mac. You can also use a clone of your Mac hard drive to boot a cantankerous system. Trying to re-install OSX. Now that you know how to deal with your “unmountable” startup disk problem, it’s time that you get your MacBook Pro running fast and smooth by downloading and installing a reliable tool like Outbyte MacRepair. Failed power supplies are sometimes accompanied by a popping sound. David – Submitted on 2010/07/24 at 3:31 am I wasnt aware of what it was called. For laptops that have removable batteries (a dying Apple breed) remove the battery and unplug the computer when troubleshooting. Thereafter follow the usual steps to back up the external drive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lashing question mark with folder, or circle/slash. Boot Into Recovery Mode to Erase Your Startup Disk. To do this, I bought a 64GB USB-C drive (one I used in the past to go to Mojave) and downloaded a copy of Catalina through the AppStore. Get an external hard drive and connect it to your Mac. I tried to run off a USB drive without the Hard Drive or Super Drive attached. Solution 2: Try to boot in Safe Mode. Note: If you're running macOS Mojave or earlier, iBoysoft Data Recovery for Mac will launch immediately when your Mac boots up. That is: the march of extensions happens as normal but it can render the desktop at the next step. Macintosh HD, or the MacBook internal hard drive, is basically the startup drive of most Apple computers. jill herlands – Submitted on 2010/08/24 at 11:45 am To run your MacBook Pro in Safe Mode, do these: It is possible that a faulty peripheral connected to your MacBook Pro could be causing your startup disk problems. Now disconnect all external peripheral devices that were previously connected to the computer such as printers, scanners, external hard drives, USBs, etc. No problems until Sunday morning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hanks so much any help much appreciated! After five seconds, switch it back on. To sum up, there are lots of potential solutions for a Mac not reading an external hard drive. Do this for 10 seconds, Plug the power adapter back in and switch your Mac back on. After reinstalling the operating system, this internal hard drive could be showing up again. I have been an electronics tech for many years so I wasn’t going to let this go that easily. Copyright © Software Tested 2013 - 2020 All rights reserved. Adam Rosen – Submitted on 2010/08/24 at 1:42 pm Boot again to verify if it works. —– Is my only hope reinstalling the OS and losing all my data? Switch off your Mac. If that is the case, you have to boot your MacBook Pro in Recovery Mode via Disk Utility. You can read detailed instructions on managing cloud storage as local drives here. Now, Apple has introduced the Apple File System (APFS) for newer operating systems. Adam Rosen – Submitted on 2010/08/16 at 9:19 am I sometimes think back and wonder what excuse they would have come up with after a new logic board did nothing to fix the problem. It is a little over a year old and I do not have a valid warranty. If you’re wondering how you’ll back up a Mac that isn’t even booting, here’s a useful piece of information — you can back up using Disk Utility which can be triggered to launch before Mac boots up. You can also try Apple Disk Utility or another third-party utility like TechTool Pro or Drive Genius to try to repair the disk. This may be the logic board, bad RAM, the power manager, a video card, etc.. Bad RAM can be a common culprit – on newer Macs, a blinking sequence of lights at startup can indicate this condition. Download and try Outbyte MacRepair right now to see what it can do for your Mac.

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