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User profile for user: dacreato_R
dacreato_R Author
User level: Level 1
4 points

My brother deleted mac system from imac now there's only windows 10. How to recover?

Hi guys,


I installed bootcamp on my imac a long time ago to explore the options of switching back and fourth through windows and mac. All to which worked perfectly.


My brother who is tech savvy decided to delete the whole mac system off the imac and now there's only windows 10 and bootcamp is gone. He wont help fix it even though he'd know how to, we're also not on speaking terms so would anyone know how to reinstall the mac system? I would also like to reinstall bootcamp as well if possible.


I listed a screenshot of the disk management, i'm not sure if that helps. I'm not that tech savvy so please bear with me, thanks.




Posted on Aug 4, 2020 8:19 PM

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User profile for user: Kappy
Kappy
User level: Level 10
361,765 points

Posted on Aug 4, 2020 8:41 PM

You could give this a try. It may or may not work.


Install macOS from Scratch


  1. Restart the computer. Immediately, at or before the chime, hold down the Command and R keys until the Apple logo and progress bar appear. Wait until the Utility Menu appears.
  2. Select Disk Utility from the Utility Menu and click on the Continue button.
  3. When Disk Utility loads select the target drive (out-dented entry w/type and size info) from the Device list.
  4. Click on the Erase button in Disk Utility's toolbar. A panel will drop down.
  5. Set the partition scheme to GUID.
  6. Set the Format type to APFS (SSDs only) or Mac OS Extended (Journaled.)
  7. Click on the Apply button, then wait for the Done button to activate and click on it.
  8. Quit Disk Utility and return to the Utility Menu.
  9. Select Install OS X and click on the Continue button.


If it does not work, then you can give this a try. It will only work on Late-2011 or later models.


Internet/Network Recovery of macOS on Erased Disk


  1. Restart the computer. Immediately, at or before the chime, hold down the (Command-Option-R) keys until a globe appears.
  2. The Utility Menu will appear in from 5-20 minutes. Be patient.
  3. Select Disk Utility and click on the Continue button.
  4. When Disk Utility loads select the target drive (out-dented entry w/type and size) from the side list.
  5. Click on the Erase button in Disk Utility's toolbar. A panel will drop down.
  6. Set the partition scheme to GUID.
  7. Set the Format type to APFS (SSDs, only if installing Mojave or Catalina ) or Mac OS Extended, (Journaled.)
  8. Provide a volume name, usually "Macintosh HD."
  9. Click on the Apply button, then click on the Done button when it activates.
  10. Quit Disk Utility and return to the Utility Menu.
  11. Select Install OS X and click on the Continue button.




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User profile for user: Kappy
Kappy
User level: Level 10
361,765 points

Aug 4, 2020 8:41 PM in response to dacreato_R

You could give this a try. It may or may not work.


Install macOS from Scratch


  1. Restart the computer. Immediately, at or before the chime, hold down the Command and R keys until the Apple logo and progress bar appear. Wait until the Utility Menu appears.
  2. Select Disk Utility from the Utility Menu and click on the Continue button.
  3. When Disk Utility loads select the target drive (out-dented entry w/type and size info) from the Device list.
  4. Click on the Erase button in Disk Utility's toolbar. A panel will drop down.
  5. Set the partition scheme to GUID.
  6. Set the Format type to APFS (SSDs only) or Mac OS Extended (Journaled.)
  7. Click on the Apply button, then wait for the Done button to activate and click on it.
  8. Quit Disk Utility and return to the Utility Menu.
  9. Select Install OS X and click on the Continue button.


If it does not work, then you can give this a try. It will only work on Late-2011 or later models.


Internet/Network Recovery of macOS on Erased Disk


  1. Restart the computer. Immediately, at or before the chime, hold down the (Command-Option-R) keys until a globe appears.
  2. The Utility Menu will appear in from 5-20 minutes. Be patient.
  3. Select Disk Utility and click on the Continue button.
  4. When Disk Utility loads select the target drive (out-dented entry w/type and size) from the side list.
  5. Click on the Erase button in Disk Utility's toolbar. A panel will drop down.
  6. Set the partition scheme to GUID.
  7. Set the Format type to APFS (SSDs, only if installing Mojave or Catalina ) or Mac OS Extended, (Journaled.)
  8. Provide a volume name, usually "Macintosh HD."
  9. Click on the Apply button, then click on the Done button when it activates.
  10. Quit Disk Utility and return to the Utility Menu.
  11. Select Install OS X and click on the Continue button.




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My brother deleted mac system from imac now there's only windows 10. How to recover?

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