Finally, Hit erase, this will format the hard drive and make it ready for Mac OS Installation. Now close the Disk Utility program and select the External Drive which I named as MacOS. This will begin installing the Mac OS on your System. This may take 20-30 minutes, depending on your system and storage type. Clover not showing. Multi boot Windows 10 & El Capitan in the same HD. Thank you both for your replies. I checked my hard drive partitions and I could see that I had Windows in the first place and Mac OS X in the second partition.

  1. Can You Run Mac Os X From An External Drive

Hi there, My internal hard drive disk has stopped working on my Macbook. The hard drive is not recognized at boot up, so I get the famous question mark. I tried to connect another hard disk and got the same error message. So I guess the problem comes from the logic board? Download rosario to vampire episode 13.

When I try to access it from the external bootable drive using Disk Utility I can't see it either. The disk I'm using is good, and it works when connected with USB (this is what I'm running now). But of course I would prefer to put it inside and connect it with SATA. Now, I'm wondering what I should do. A new logical board is expensive, and it would be too bad to change it completely, because everything else is working perfectly. So, I'd like to get some advice, maybe for how to check the connectors, change the disk controller or add a new one, or whatever can help to get a more practical solution.

Thank you for your help. Hello everyone the problem is in fact the SATA connector at the tip of the cable.

Mac

It only makes good contact with some HDDs. Put 2 lines of masking tape on top of the DATA side of the HDD connector, then plug in the ribbon cable and turn on the machine. You will get the apple sign if the HDD has OS on it if its empty boot from cd and check on disk utillity. Putting the tape: instruments: masking tape(blue or white), a small flat screw driver, and scissors. Put a piece of tape on top of the DATA side or if you want it could go accross the DATA AND POWER, NOTE, ON TOP OF THE PLASTIC AREA, DO NOT PUT TAPE ON THE PINS SIDE, I REPEAT DO NOT PUT THE TAPE ON WHERE THE PINS MAKE CONTACT. THE TAPE GOES ON THE UPPER SIDE THAT IS ONLY PLASTIC.

Cut tape very close to the edge. Make the division between DATA AND POWER on the tape and plug into ribbon cable.

Can You Run Mac Os X From An External Drive

Totally works! MB PRO 2012.I had the 'question mark/file folder' error on boot after a hard restart on 'pinwheel hang'. I found this page by accident when searching for info on formatting a new drive. This was after many hours of frustration and a trip to the Genius bar where the drive failed their diagnostics. It just made no sense to me that it would be a failed hard drive so I pulled the drive, cabled it to a PC, retrieved my data (telling me the drive was good). On a lark I popped an old drive into the MB PRO and it did not show up in disk utility when trying to restore the OS.

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No way.TWO bad drives? I tried this and am back in business! I will order a new cable just in case.but this enabled me to get a CURRENT time machine back up. My hat is off to you.thank you, Thank you, THANK YOU!

Jon, The tape goes on the hard plastic connector (that connects to the drive) at the end of the cable. You want the tape to reduce the inner space so that it forces the metal pins to make better contact, being careful not to place the tape over the metal pins themselves else you'll have no connection. I basically inserted the end of the tape strip into the thin slot of the connector, than wrapped around a couple of mm onto the outside of the connector. **BUT** while the trick allowed me to finally see the drive from Disk Utility, I never got it beyond that.

In the end I purchased a replacement for the cable and the problem was solved. Different thing are happening to different people here. I wanted to replace the 500GB SATA hard drive in my MacBook Pro with a 750GB disk.

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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 the USB - SATA interface. Time came to swap the disks over - ie put the 750 inside the MacBook and take the 500GB out. No joy - would not boot - got the flashing Folder with question mark. Read all the stuff in here about new cables etc. Got a new cable - same problem.

Turned out to be formatting of the disk. Showed up as having one small partition when installed internally - doesn't seem to cause any problems when connected externally. Have reformatted the disk as MacOS extended journaled, 1 partition - disk now recognised.

Cost me £20 for the cable and a lot of wasted time reinstalling the system all over again etc etc. But heh ho - stuff happens. Anyone want a brand new cable.?! It does help.

At least it fixes the problem when the HDD suddenly 'disappears' thus failing to boot. Forget software solutions, this is a hardware problem and the new cable fixes it. 20 years of building and repairing PCs I never had this happening or heard of it that a SATA cable is 'going bad'. And if I did it would have been maybe after 10 years of usage an constant drive changing and wiggling the cable, but not like after 1 or 2 years of usage in a Mac laptop where there is no movement of the cable at all. Hi, this wonder like a charm. Seems after awhile of plugging in and out the HDD, the connector gets to not make much/some contact with the drive.