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Un-Pear for OS X High Sierra

Prepare your HD

Reduce the used disk space on your Macintosh HD to at least 20% below its original size. For example, if your original Macintosh HD size before Pear-ing was 121GB, you must make sure that your current system has 97GB or less on it now.

File Vault

  • Go to System Preferences and Security & Privacy then FileValult and click on Turn-Off. Please, wait until the process finish before proceding.

  • FileVault Mac OS X Preferences Window

    Time Machine

    • Create a Time Machine backup and ensure that you have backed up your data. This step is critical for the un-Pearing process. For added protection, in addition to the TimeMachine Backup, feel free to use an online backup as well.

    • Mac OS X Time Machine Preferences Window

      Turn off

      • Shut Down your computer. You can press the power button or go to the Apple menu bar and click Shut Down.

      • Mac OS X shut down dialogue

        Remove TarDisk (Do not remove if on High Sierra)

        • Sierra users:

          Slide your TarDisk out. Remember, never use any type of metal to remove it, insead a fingernail or the edge of a Credit Card both work great!

          High Sierra users:

          DO NOT remove TarDisk if your Mac is running OS X High Sierra.

        • TarDisk Pear hard drive being inserted into MacBook

          Command (⌘) + R

          • With the TarDisk Removed, restart your computer into Recovery Mode:
            (1) First, turn off your Mac by pressing and holding the power button for a few seconds.
            (2) Once it's off, press the power button once to turn your Mac back on. Immediately press and hold the Command (⌘) + R keys when you hear the startup sound to start your Mac from OS X Recovery. Keep these two keys held down until you see an Apple logo or globe appear.
            You will then see a window here like the below. Enter Disk Utility and click continue.

          • Mac OS X recovery Utilties window

            OS X Sierra (or newer)

            • The window should look something like the following screen shot. (If you find that the Disk Utility on your computer does not look like the image on the side, and instead looks like this, you are running an older (more friendly) operating system and need to follow the guide located here...)

            • Mac OS X Disk Utility

              Disk being erased

              • Please ensure that you have backed up your data before proceeding to this step as it is going to erase all your data.

                On Disk Utility, select Macintosh HD (or Apple SSD Media) and choose Erase. Name your HD Macintosh HD, leave the format and scheme as default (Mac OS Extended (Journaled)) and click Erase.

              • Erasing HD OS X Sierra

                Verify Disk

                • Once completed, quit terminal by clicking the red "X" in the top left hand corner of the Terminal Window. Now, enter Disk Utility. Check that the newly repaired disk is healthy by clicking First Aid and then Run.

                • Mac OS X Disk Utility First Aid

                  First Aid Completed

                  • If the fix worked you should get a green check mark result that reads: "First Aid process is complete, press Done to continue." If you click "Show Details," You will see that an entry appears "The volume OS X Base System appears to be OK." followed by "Operation successful." If you get the checkmark, proceed to section #13.

                    If you do not get the Green check mark, exit "Disk Utility" by clicking the red "X" in the upper left hand corner of the window, and proceed to step #11.

                  • Mac OS X Disk Utility First Aid Successful

                    Open Terminal

                    • From the Menu Bar of the "OSX Utilities Screen", click on Utilities >> Terminal.

                      Note, if step 10 completed successfully with a green check mark, this step is unnecessary and you can skip to step #13.

                    • how to select Terminal from os x utilities window

                      Manually Fix Disk

                      • 12.1 You should see a terminal screen with a blinking cursor appear. Type in the following command exactly; diskutil CS list and hit the enter key.

                      • Logical Volume Group in OS X Terminal

                        • 12.2 You should see results like the screen shot. Notice where it says "Logical Volume Group". Copy this 32-digit number.

                        • Delete Core Storage

                          • 12.3 Type in the following command exactly and fill in the Blank with the 32 digit "Logical Volume Group" number identified in step 12.2:
                            diskutil cs delete ______________________
                            (Ex: diskutil coreStorage delete 35BA0C45-5314-45CB-A06D-6595EE8EDB1D)

                          • Logical Volume Group in OS X Terminal

                            • 12.4 Hit the Enter key to run the command. Once successful you should see a screen like the below.

                            • Logical Volume successful deletion

                              Exit Disk Utility

                              • Exit Disk Utility to bring you back to the Safe Mode Boot "OS X Utilities screen". Click Restore From Time Machine Backup.

                              • Mac OS X Utilities

                                Restore Time Machine

                                • Click Continue and follow the restore process.

                                • Restore from Time Machine OS X

                                  Select Disk

                                  • Select your newly repaired Macintosh HD. Note that the "Space Available" is the size of your SSD without Pear.

                                  • Select Destination disk for Time Machine Restore


                                    • You will see the following dialog. "In order to restore from a Time Machine back up, all current data will be erased, to make way for your backed up data". Click Continue.

                                    • Click continue dialogue to restore from Time Machine

                                      Erasing HD

                                      • The HD will be erased to make space for the data recorded in the Time Machine Backup.

                                      • Time Machine Restoring erasing Macintosh HD


                                        • Then the restore process will begin. It can take some time, so let it run without interrupting the process. Make sure your computer is plugged into a power supply.

                                        • Time Machine restoring files

                                          That's it, you are done!

                                          Install Tardisk Again

                                          If you would like to use TarDisk again, you will need to activate it by deleting the EFI partition. Please see our FAQ for more information on how to do this or click here for step-by-step guide.

                                          A few notes:

                                          1. This process removes your Pear'ed TarDisk from your system.

                                          2. If you would like to use TarDisk again, you will need to activate it by deleting the EFI partition. Please see our FAQ for more information on how to do this here.

                                          3. If you would like to Pear your TarDisk to your system again, you will need to activate the TarDisk as mentioned in the previous step. Although our Terms of Service specify a one-time-use license, we are happy to help you Pear a second time! Send an email to us with the subject line: "Pear after un-Pear" and the following information: your MacBook's serial number and your original receipt (The email confirmation of your order).