So you have done installing Ubuntu or Linux Mint on MacBook Pro by following the articles on this site. Although both Ubuntu or Linux Mint work well on MacBook, you may want to remove GRUB Bootloader MacBook Pro for some reasons. This article guides you how to remove GRUB Bootloader on MacBook Pro. It should be also applicable for MacBook Pro, MacBook Air, iMac and Mac Pro.
Absolutely it is very easy to remove GRUB Bootloader MacBook Pro. Once it is removed, it will automatically restore with the Mac Boot loader.
Let’s go to the guide to Remove GRUB Bootloader on MacBook Pro
Grub2Win is completely free, open source software. All modules are digitally signed for your security. Safely boot multiple Windows and Linux systems on both GPT and MBR disks. Supports both 64 and 32 bit EFI firmware as well as BIOS. Installs to Windows 10, 8, 7 and XP. Grub2Win boots native GNU Grub version 2.04 code. Jun 28, 2020 Both of the boot managers available to use can handle the dual-booting process; they can even handle more than two OSes, but the Mac's boot manager won’t recognize the Ubuntu OS without a bit of fiddling, and the GRUB boot manager isn't particularly easy to use. I had installed a Ubuntu partition on my Mac, but last night the keyboard broke, so I was trying to reinstall Mac OS from the recovery mode and accidentally wrongly deleted all the partitions my Mac had and now when I turn on the Mac I get this screen. I know I messed up the computer, but is there any way to fix this?
- Boot into OS X and open Terminal (Utilities/Terminal)
- In Terminal application write the following commands!
![Grub For Mac Os Grub For Mac Os](/uploads/1/1/9/6/119678451/965499908.png)
- Reboot the Mac
Once the MacBook reboot, you should not see the Ubuntu GRUB Bootloader anymore.
To make it easier to follow the guide above, I have create a video that you can find below
Hopefully this brief post is helpful for you to remove Linux Grub Boot loader on your MacBook.
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The bootloader loads after the BIOS sets up the computer and tries to find an operating system to start. A bootloader can start different kinds of operating systems.
On a real mac the bootloader 'boot-132' is used.
Currently, Chameleon or PC EFI are used most. The GNU GRUB 2 should also be able to boot XNU from a GUID disk.
Bootloaders for OSX86 mainly emulate an EFI, but can also load up additional kexts or change the DSDT.
The whole boot-process can be seen in this PDF.
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[edit] OS X boot process
A Darwin bootloader passes arguments to the XNU kernel in the
struct boot_args
. This structure is defined in the BootX project in the file boot_args.h .struct boot_args {
unsigned short Revision; /* Revision of boot_args structure */
unsigned short Version; /* Version of boot_args structure */
char CommandLine[BOOT_LINE_LENGTH]; /* Passed in command line */
DRAMBank PhysicalDRAM[kMaxDRAMBanks]; /* base/range pairs for the 26 DRAM banks */
Boot_Video Video; /* Video Information */
unsigned long machineType; /* Machine Type (gestalt) */
void *deviceTreeP; /* Base of flattened device tree */
unsigned long deviceTreeLength; /* Length of flattened tree */
unsigned long topOfKernelData; /* Last address of kernel data area*/
Grub For Mac Os 10.10
};
![Grub for mac os 10.10 Grub for mac os 10.10](/uploads/1/1/9/6/119678451/677969024.png)
[edit] OS X bootflags
The bootloader loads the kernel (default filename is mach_kernel), but also command line arguments (bootflags) can be posted to the kernel which change the way the kernel loads up.
- CPUS=1
- only one CPU is used
- -s
- OSX boots in single user mode, ie commandline for rescue usage
- -v
- OSX boots in verbose mode, which shows the kernel loading process
- arch=i386
- OSX boots in 32bit mode
- -f
- forces rebuilding of extensions cache mkext
- 'Graphics Mode'='1024x768x32'
- change display resolution. For a permanent change see Technical_FAQ#How_to_change_display_resolution.3F
- 'rd=disk0s1'
- boot from a certain partition specified in BSD format. Disk 0 specifies first HDD and s1 specifies first partition as 0 is the MBR.
[edit]Chameleon
[edit]AsereBLN Booter
[edit]PC EFI
Grub For Mac Os High Sierra
[edit]Weblinks
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This page was last modified on 24 November 2010, at 03:27.
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