I Think I Deleted My Hard Drive Mac

Oct 27, 2020 Step 2. Launch Disk Drill and Scan the Erased Hard Drive. Next, launch Disk Drill from the Applications folder and scan the erased hard drive. To do that, you simply need to click the Recover button next to it, and Disk Drill will automatically apply all available recovery algorithms in the optimal order.

  1. Nov 28, 2021 Summary: If your files get lost, deleted, missing, or disappeared from an external hard drive or a USB flash drive, you can recover them with 4 methods. Downloading iBoysoft Data Recovery for Mac to recover lost data from external hard drives on Mac is one of the easiest.
  2. Feb 26, 2015 The only thing I can think of is the SATA cable might have come loose from the drive or the drive itself is dead. If you can get an Apple Authorized shop or a local Apple Store to look at it, then you can get an estimate on the cost to fix. Once last screen shot of your System Information may help us.
  3. Why received’t my Mac let me erase the hard drive? It’s now not usually conceivable to erase the startup disk as a result of your Mac is the use of it to run macOS. Recovery Mode is a different partition for your Mac you can use to repair from a backup, reinstall macOS, get on-line toughen, or erase your start.
  4. If you don't know which drive to search, tap on the 'I can't find my partition' option and hit the Start button. Scan the selected location. Typically, the software will run an all-around scan and search for the lost and deleted files on the entire drive. Preview and recover deleted Mac files.
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Topic starter

Hi all,

I am trying to upgrade my Mid-2012 Macbook Pro so I started by erasing my hard drive.

I am a rookie so I messed up and didn't realize it would delete my OS also. I was on Mojave.
Now, when I do CMD+R at startup, it only offers for me to reinstall LION.

Does anyone have any advice?
I really would like to be on Mojave because it is much better..., right?

I'm planning on putting in a new battery, a Samsung 860 EVO SSD, and 2x8GB of Corsair RAM after that.

Does anyone have any good advice they can offer in this situation? Thanks


I haven't tried this, but, according to: https://www.macstrategy.com/article.php?45

  • Command (⌘)-R : Install the latest macOS that was installed on your Mac, without upgrading to a later version.*
  • Option-Command-R : Upgrade to the latest macOS that is compatible with your Mac.**
  • Shift-Option-Command-R : (macOS Sierra 10.12.4 or later) Install the macOS that came with your Mac, or the version closest to it that is still available.

An alternative, would be to first install Lion and then upgrade. MacTracker claims that your 2012 MacBook pro is compatible with Mojave.


About macOS Recovery,

How to reinstall macOS from macOS Recovery,

Command (⌘)-R

Reinstall the latest macOS that was installed on your Mac (recommended).


Upgrade to the latest macOS that is compatible with your Mac.


Reinstall the macOS that came with your Mac, or the closest version still available.

This next link goes slightly beyond the scope of your question but may be an appropriate consideration.

How to create a bootable installer for macOS,


Accidentally Deleted Macintosh Hd Drive

This post was modified 2 years ago 4 times by Alex Santos
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by Jenefey AaronUpdated on 2021-06-16 / Update for OS X

You may need to boot up your Mac using an external drive or boot volume once in a while, rather than using a start up disk. Booting with an external disk has a lot of significance. Maybe you want to troubleshoot some problems, repair the disk, do partitions, format the entire disk, update, and install OS X etc. All these are executed perfectly when you use an external boot volume to boot up your Mac. In this article, we are here with the detailed step by step guide on how to boot Mac from external hard drive easily. So, let's get started…

How to Recover Data from External Hard Drive in 3 Ways?

Part 1: How to Boot Mac from USB Drive/CD/DVD


Actually, it is possible to boot Mac from external drive or a hard drive, but there are a few specific requirements needed for your Mac to become eligible for that process.

  • First, you have to have an Intel-Based Mac.
  • Second, the CD or DVD you are using to boot must contain Apple’s Super Drive or if you are using a USB drive then it should be formatted with GUID Partition, and you are also required to install OS X installer. Apple is against booting Mac from an external storage device, because you may install an older version of OS X than the one you were using.

Boot from CD or DVD:

If you want to boot your MacBook/Air/Pro/iMac from an optical media like CD or DVD you need to follow the steps below:

1. Open your Mac or restart the device if you were already using it.

2. When the startup music is playing press and hold the “C” key from the keyboard.

3. This will start the OS X installer from the CD/DVD on your Mac.

So, it is not too complicated to Mac boot from CD/DVD. You can easily burn a bootable image of OS X on a DVD by using Disk Utility.

Boot from External USB:

Using your USB drive to boot Mac is not as simple as you think. You need to prepare your USB drive beforehand for this specific purpose. You have to format the USB drive and insert the proper Operating System, which is OS X.

1. Turn on your Mac.

2. As soon as the startup music begins you need to press and keep holding the 'Option' key.

I Think I Deleted My Hard Drive Mac Compatible

3. After that release that key, the Startup manager will be launched.

4. Startup Manager will begin scanning your device and you will be provided with a list of devices that are connected to your Mac.

Accidentally Erased Mac Hard Drive

5. Now, select the drive you want to use with your mouse.

6. Finally, press 'Return' key on the selected option to boot Mac.

Accidentally Erased Mac Os

This way you can boot your Mac with an external USB drive, but the most critical part is to prepare the USB drive. If you have multiple USB drives connected, then the Startup Manager shall list the drives with the bootable OS. So, this is how to boot Mac from USB drive.

Part 2: Common Problems and Fixes When Boot Mac from External Drive

You may face several issues during MacBook Pro Boot from USB or any external drive. So, a few FAQs are mentioned below which may help you when you are facing any difficulties.

  • 1. Have you tried connecting to a different USB port?
  • If you are unable to startup the installer after connecting the USB drive to your Mac, then first you should try connecting it to a different USB port. It may fix the problem.

  • 2. Have you formatted the USB drive with GUID partition?
  • If you are having problems with your USB storage device then you need to make sure that if you have properly formatted the drive with GUID partition. You have to do it properly otherwise the Intel-Based Mac won't start.

  • 3. Is your Mac shutting down after connecting the disk?
  • Actually, the MacBook contains a preventive measure and because of that computer shuts down automatically when a damaged USB drive is connected or if the USB port itself is damaged.

  • 4. Is your Disk needs repair?
  • If your Mac fails to boot from an external drive even though you have properly installed the OS X installer, then maybe your disk is damaged. You should open Disk Utility and ask permission to repair disk.

  • 5. Have you connected the USB drive properly?
  • There are two types of Apple keyboards, Wired and Wireless. There are also some keyboards with inbuilt USB ports but they may not have enough power to run the drive.

I Think I Deleted My Hard Drive Mac Os

So, this is how to startup Mac from external drive. Follow the frequently asked questions to clear any doubts that you have while booting from external hard drive Mac.

In case, you want to recover any lost or deleted Mac files after a boot, we highly recommend you to go for Tenorshare Any Data Recovery for Mac. It is a utility data recovery tool capable of recovering any type of data from Mac with ease. Go for it!

Recover Unlimited Mac Data for You

Accidentally Deleted Macintosh Hd

  • Recover data deleted, formatted or lost on Mac;
  • Restore files from hard drive and external storage devices;
  • Recover data from failed/crashed/dead MacBook;
  • Fully supported latest macOS 10.15 Catalina;