2

I had a dual boot Linux Mint 19 and macOS on my MacBookPro11,2. Since the CPU was overheating with Linux, I decided today to delete the Linux partition. Little problem, when I start my MacBook Pro now, I just have this menu on startup:

"GNU Grub version 2.02 - Minimal BASH-Like line editing is supported grub>"

If I type ls, this is what I get:

(hd0) (hd1) (hd1,gpt2) (hd1,gpt1).

What could I do to boot into macOS?

Output from diskutil list disk0.

/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF               228.8 GB   disk0s2
  • You may also want to ask a question about how to remove Grub from your EFI partition. – David Anderson May 9 at 21:47
1

Use Startup Manager

When you use Startup Manager to select a startup disk, your Mac starts up from that disk once, then returns to using the disk selected in Startup Disk preferences.

  1. Press and hold the option key immediately after turning on or restarting your Mac.
  2. Release the Option key when you see the Startup Manager window.

    If your Mac is protected by a firmware password, you can release the key when you're asked to enter the password.

  3. Select your startup disk, then click the arrow under its icon, or press Return.

    If you press and hold the control key during this step, your selection is saved in Startup Disk preferences, so it persists until you change it.

If your Mac is using OS X Lion 10.7.3 or later, you can also use this method to start up from your Time Machine backup disk. Startup Manager identifies your Time Machine backup as ”EFI Boot.”

References
The above answer was copied from "How to select a different startup disk", https://support.apple.com/en-us/HT202796, January 29, 2019.

  • Thanks for your help! Unfortunately, when I hold the "Alt" key during startup, I only have one choice for the startup : "EFI Boot". After selecting it, I only have the grub> command line. – thefruitismine May 10 at 7:27
  • I suppose you will need to post the output from diskutil list disk0 for this computer. You can do this if booted to Recovery mode. An alternative would be to post the output from sudo fdisk -l /dev/sda from a live version of Linux. Also, add to your question the model year of your Mac and the version of OS X (macOS) that is installed. – David Anderson May 10 at 10:34
  • Here is the result of the diskutil command :/dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *251.0 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF 228.8 GB disk0s2 The model is : « MacBookPro11,2" (I bought it in 2015) Software: System Software Overview: System Version: OS X 10.10.5 (14F27) Kernel Version: Darwin 14.5.0 – thefruitismine May 10 at 11:10

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .