How do I remove Ubuntu from my MacBook?

Question

My MacBook has three OSs at the same time: macOS, Boot Camp Windows 10, and Ubuntu. It will display Windows, Macintosh HD, and EFI Boot (going to Ubuntu) when pressing the option when booting. I split the disk size as follows:

macOS: 85 GB
Windows: 120 GB
Ubuntu: 40 GB
total: 256 GB

• I used Disk Utility when trying to remove Ubuntu. However, I could not remove the partition Ubuntu uses. Then, macOS is broken (only Windows is fine). I solved macOS by following methods: macOS partition startup Volume type FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF.

• Then, Windows is broken (only macOS is fine). I solved Windows by following methods: bootcamp NO BOOTABLE DEVICE after gpt add EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 disk0.

• Now Windows and macOS are fine. I hope that EFI Boot will not be displayed when pressing the option when booting and Ubuntu 40 GB comes back to macOS (ie, macOS: 125 GB, Windows: 120 GB). What should I do without destroying other OSs while removing Ubuntu?

sh-3.2# diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk2         85.0 GB    disk0s2
   3:       Microsoft Basic Data BOOTCAMP                125.8 GB   disk0s3 
sh-3.2# gpt -vv -r show /dev/disk0
gpt show: /dev/disk0: mediasize=251000193024; sectorsize=512; blocks=490234752
gpt show: /dev/disk0: PMBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 490234751
      start       size  index  contents
          0          1         PMBR
          1          1         Pri GPT header
          2         32         Pri GPT table
         34          6         
         40     409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
     409640  166018024      2  GPT part - 7C3457EF-0000-11AA-AA11-00306543ECAC
  166427664   78124016         
  244551680  245682176      3  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
  490233856        863         
  490234719         32         Sec GPT table
  490234751          1         Sec GPT header

Answer 1

1. Boot to macOS Catalina and enter the following commands.

   diskutil apfs resizecontainer disk0s2 0
   sudo diskutil mount disk0s1
   cd /Volumes/EFI/EFI
   rm -r BOOT
   rm -r ubuntu
   cd ~
   diskutil unmount disk0s1
   

2. Open a Command Prompt window by following steps 1 through 3 given as an update in this answer.

3. Enter the command given below.

   diskpart
   

   The command is interactive. You should input the following.

   select volume c:
   set id=7
   extend filesystem
   active
   exit
   

4. Rebuild the BCD by following steps 4 and 5 given as an update in this answer.

---

Steps to Uninstall Ubuntu

These steps assume the Mac was setup the same as before you first uninstalled Ubuntu.

1. Boot to Windows.

2. Download the GPT fdisk project from sourceforge.net. Extract the files to the default location.

3. Open a Command Prompt window as an administrator.

4. Enter the command given below. If the GPT fdisk version is not 1.0.9, then make the appropriate substitutions.

   %userprofile%\gdisk-windows-1.0.9\gdisk64 0:
   

   This command is interactive. Enter the values given in the first column of the following table.

   Entry	Type	Comment
   s	command	Sort partitions
   p	command	Print the partition table
   d	command	Delete a partition
   3	parameter	Partition number
   w	command	Write table to disk and exit
   y	parameter	Confirm to proceed

5. Boot to macOS Catalina and enter the following commands.

   diskutil apfs resizecontainer disk0s2 0
   sudo diskutil mount disk0s1
   cd /Volumes/EFI/EFI
   rm -r BOOT
   rm -r ubuntu
   cd ~
   diskutil unmount disk0s1
   

6. Boot to Windows.

7. Change the partition type for drive C: to 7. Two different ways to accomplish this are given below. The first way requires a full functioning Windows Recovery Environment (Windows RE). If your Windows RE is damaged or improperly configured, then choose the second way.

   • The First Way: Click Start > Settings > Update & Security > Recovery > under "Advanced startup", click Restart now.

     When the "Choose an option" menu appears, Click Troubleshoot > Advanced options > Command Prompt. If Command Prompt is missing, then your Windows RE is damaged or improperly configured. Sign in to get a Command Prompt window.

     Enter the command given below.

     diskpart
     

     The command is interactive. You should input the following.

     select volume c:
     set id=7
     exit
     

     Enter the command below to close the Command Prompt window.

     exit
     

     When the "Choose an option" menu appears, Click Continue.

   • The Second Way: Open a Command Prompt window as an administrator. Enter the command given below. If the GPT fdisk version is not 1.0.9, then make the appropriate substitutions.

     %userprofile%\gdisk-windows-1.0.9\gdisk64 0:
     

     This command is interactive. Enter the values given in the first column of the following table.

     Entry	Type	Comment
     r	command	Switch to recovery and transformations options menu
     o	command	Print protective MBR data
     h	command	Make hybrid MBR
     2 3	parameter	Partition numbers to be added to the hybrid MBR, in sequence
     y	parameter	Place EFI GPT (0xEE) partition first in MBR (good for GRUB)?
     ff	parameter	MBR hex code for the second MBR partition
     n	parameter	Set the boot flag?
     7	parameter	MBR hex code for the third MBR partition
     y	parameter	Set the boot flag?
     n	parameter	Use remaining partition space to protect more partitions?
     o	command	Print protective MBR data
     w	command	Write table to disk and exit
     y	parameter	Confirm to proceed

---

References

• Windows Recovery Environment (Windows RE)