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10

There seems to be a problem with the radeon driver when booting. You can test a fix by doing this: When you see the grub menu, press 'e', which will allow you to edit the entry. Go to the line with "linux...." and look for where it says 'ro'. After the 'ro', add 'nomodeset' (without quotes), and then boot (press F10). If that works, you can make it ...


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Update - i was able to solve this situation. The simplest solutions evade at times. In case someone else runs into this, what i did- In the grub menu i was trying to see if i could do something in the command line interface.. Just typed exit & immediately i was popped back onto refind. Immediately booted into OS X & reinstalled refind..


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I installed debian on my computer. I probably did not choose the same configuration as you did. The output from diskutil list disk1 is shown below. /dev/disk1 (external, virtual): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme +109.3 GB disk1 1: ...


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I sugest the easiest way is to instal Mac and windows as you have done before make the partition etc then when you go to install Grub there is an option where to install it. install to the partition where the linux installation is (take note during partitioning the location) this way the boot partition doesn't get edited and often it cant be on new systems ...


2

If you have multiple boots on your computer have you tried holding options when your computer is restarting? I use this to boot into different OSes. Otherwise, you should be able to install MacOS by using internet recovery. I have replaced an SSD with no partitions on it and internet recovery helped install the OS fresh on the new disk. Here is an article ...


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You need startup files for your target OS. 1) Plug the Linux Installer on a Windows OS (It will mount the EFI partition only) 2) Copy the contents to some shared place to access it in Mac 3) Mount the EFI partition on your MAC 4) Copy the Linux startup files alongside Apple folder


2

With Ubuntu, GRUB files are stored in the EFI/BOOT and EFI/ubuntu folders in the hidden EFI partition. Apply the following steps to remove the GRUB files. Enter the following command to determine the identifier for the hidden EFI partition on the external drive. diskutil list For this example, I will assume the identifier is disk2s1. In the following steps,...


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You are trying to boot from the flash drive after you have installed Ubuntu. Instead, you need to boot to GRUB installed on your internal drive. This can be done by pressing the esc key once immediately after selecting Ubuntu from the Start Menu. (I assume here you installed for a UEFI boot.) It took me a couple tries before getting the hang of it. Once ...


2

Once in GRUB press the e key. We’re now going to disable the AMD graphics card while we boot into the Ubuntu Live CD. Look for the line set gfxpayload=keep. Once you’ve found it, type the following lines underneath to disable the AMD graphics card: outb 0x728 1 outb 0x710 2 outb 0x740 2 outb 0x750 0 Next find the kernel line and after “quiet splash” , add ...


2

Assuming you did not create any new partitions on your Mac, then Grub will only exist in the hidden EFI partition. If there is no evidence of Grub in the Startup Manager menu, then you can just leave the Grub files on the EFI partition. You can make macOS the default by holding down the control key before selecting macOS in the Startup Manager menu. If ...


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ok, there's an eject button: I held that down at boot. Still get the grub error, but at least the DVD's ejected.


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If you have an bootable macOS installer USB (Here is how to make one), boot from the installer directly by holding Option Key. The options would require having access to a Mac (VM or real) Another option could be to install macOS on an external drive and boot from it(holding option while booting), and try to install macOS on the internal disk. Third ...


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OK, after searching for 2 days I finally got the answer. So I had a bootable apfs OSX partition with rEFInd installed from OSX. rEFIND couldn't find ext4 partition from OSX natively. That was the problem. ext4 partition was cloned from source later on. Download Kali live-USB, mount it using dd or rufus or any other software. Reboot, Hold alt to boot from ...


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Ubuntu has instructions for most macbook pro's. Depending on which version of the macbook pro you have you may not need rEFInd: https://help.ubuntu.com/community/MacBookPro


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If you are in the internet recovery mode, make sure you are connected directly to your internet router via an ethernet cable. What you could do is hold the following key combinations first. Shift-Option-Command-R, this will bring you to install the MacOS on your Mac HD. But you could first refresh NVRAM before resetting your system: https://support.apple....


1

I'm posting the solution that worked for me in case of anyone else that has this problem comes across this. I changed the path of the grub EFI executable from /efi/debian/grubx64.efi to /efi/boot/bootx64.efi. Now it is appearing as a boot device in the boot selector, but it still wasn't booting by default. So to make grub boot by default I ran the following ...


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Just run the refind-install script with sudo in the OS X side. I could not get to the recovery mode. This solved the problem.


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If you have a graphics card in pull it out and use the integrated graphics controller. If you dont have an integrated one try another card.


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