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On my iMac I installed a dual boot with Linux Mint. However, I realized that the videos were freezing some times, so I deleted the Linux partition. Now, the Mac is working normally, but instead of having a partition of 1 TB, I just have a 800GB's total space on my Hard Disk.

How can I do to retrieve the 200GB of space that were on the Linux partition I deleted?

Below is the output from diskutil list.

/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   #:                       TYPE NAME                    SIZE       IDENTIFIER 
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            800.0 GB   disk0s2
   3:                  Apple_HFS Recovery HD             650.0 MB   disk0s3
   4: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF               1.0 MB     disk0s4
  • 1
    Post the results from the Terminal application command diskutil list to your question. – David Anderson May 9 at 20:37
  • Here is the result of the command "diskutil list" : /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_HFS Macintosh HD 800.0 GB disk0s2 3: Apple_HFS Recovery HD 650.0 MB disk0s3 4: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF 1.0 MB disk0s4 – thefruitismine May 10 at 7:29
  • Why do you say in this question: "the Mac is working normally", but in the other question you say "MacBook Pro stuck on GRUB minimal Bash at startup"? – David Anderson May 10 at 7:59
  • Actually, I have 2 Mac computers : a 27 inch iMac, which is working normally (except I don't know how to retrieve my 200GB partition) : it's the one concerned by this question. My second computer is a MacBook Pro, which can't boot : it's stuck on the grub command line. For this second computer, another topic has been created. – thefruitismine May 10 at 8:44
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Generally, the commands below should work.

sudo diskutil erasevolume free none disk0s4
sudo diskutil resizevolume disk0s2 R
  • I launched both commands, but the Mac OS partition hasn't resized to 1TB : $ $ diskutil resizevolume disk0s2 R Finished partitioning on disk0s2 Macintosh HD /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_HFS Macintosh HD 800.5 GB disk0s2 3: Apple_HFS Recovery HD 650.0 MB disk0s3 – thefruitismine May 10 at 11:23
  • I launched these commands without sudo, and after rebooting my mac, it's refuses to start : it makes a loop with the startup sound and I can't access to anything (the screen blinkes every 2 seconds as it restarts) – thefruitismine May 10 at 11:32

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