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Level 1

13 points

cannot launch gdisk on terminal

I have macbook pro OS X El Capitan and trying to launch gdisk on terminal but it gives me this error:

GPT fdisk (gdisk) version 1.0.1

Problem opening /dev/disk1 for reading! Error is 16.

I disabled the System Integrity Protection and checked it after booting and found it disabled. I'm using gdisk to overcome the partitioning problem "Windows detects GPT disk as MBR in EFI boot"

I also have another problem which is when I reboot my laptop after adding windows 10 by Boot Camp Assaistant I get this error unless I hit "alt" key, the error is:

"no bootable device. insert boot disk and press any key"

Any suggestions?

MacBook Pro, OS X El Capitan (10.11.5)

Posted on Jun 5, 2016 8:11 PM

Best reply

Loner T

Level 9

59,471 points

Posted on Jul 11, 2017 10:52 AM

You have either El Capitan or Sierra. You will need to disable SIP by booting into Local Recovery (using Command+R - not Internet Recovery) and click on Utilities -> Terminal and type

csrutil status

csrutil disable

csrutil status

Boot normally and check the output of csrutil status which should now be disabled. Now test GDisk.

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20 replies

fahad. Author

Level 1

13 points

Jun 13, 2016 6:50 PM in response to Loner T

I'm sorry but I didn't get your question. Is the following the answer to your question? MacBook Pro Early 2011OS X El Capitan 10.11.5

IF not, please explain what do you mean by your question.

Thanks.

Loner T

Level 9

59,471 points

Jun 13, 2016 7:38 PM in response to fahad.

The reason for asking that question is that your specific model from 2011 only supports a BIOS/MBR installation, and will have issues if you remove the MBR. Your Mac also requires a physical DVD to install Windows 7/8.1. W10 is not officially supported on the 2011 models.

The only path to get W10 on your model, is to upgrade from W7/W8.1 to W10 using in-place upgrade.

Loner T

Level 9

59,471 points

Oct 16, 2017 2:55 AM in response to bluephoenix71

Disable SIP in local recovery.

Nov 7, 2017 9:10 AM in response to fahad.

So I've been reading through this thread because I've run into a similar issue however my terminal says Error is 1 instead of 2 or anything else

Loner T

Level 9

59,471 points

Nov 7, 2017 9:13 AM in response to aedwards97

Please start a new discussion to avoid confusion since this is marked as solved. Post the output of the command you run (text output is preferred).

cannot launch gdisk on terminal