Install Os Mac From Usb

2/13/2022by admin

Restoring Mac from external hard drive on Mac is one of the choices that people apply if they can’t connect to a stable Wi-Fi while restoring a Mac. And it is also an exclusive feature that Mac turns any removable storage device into a recovery tool. Here are the 7 steps you need to know for how to restore Mac from External hard drive, including USB flash drive.

  • How to Create Bootable USB on Mac. There are a few general guidelines that can help get your machine started which are mentioned above, regardless of the OS the user prefers. Here are the methods to create a bootable USB drive on Mac. Creating a Bootable USB Using Terminal. The terminal is the default gateway to the command line on a Mac.
  • Step 2: Now we need to create a bootable USB drive. We have a guide for that, so make sure you follow it and move on to the next step: Create macOS Catalina Bootable USB Flash Drive Installer, Here’s How. Step 3: When you have your USB drive, turn your Mac off and insert it. Turn the Mac back on while holding the Option key.
  • Also, check to see what ports you have on your Mac. The 12' MacBook has a single USB-C port, while MacBook Pro models from 2016 and later feature USB-C ports exclusively. Fortunately, there are USB-C drives available, or you can use a USB-C to USB-A adapter. It's best to go with a USB 3.0 drive, with a minimum size of 16GB.
  • Note that by default, the Mac will start booting up directly to the external hard drive until you change it. The second method to install OS X is to restart the Mac and press and hold the COMMAND + R keys. This will load up OS X Recovery. The OS X Utilities screen will appear and here you want to click on Reinstall OS X.

Note: while using a USB memory stick to restore Mac, all data on the device will be erase completely. If you have some important files there, please move them to somewhere to store first.


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Step 1. Find and launch Disk Utility. It is in the Utilities folder under Applications. Next, plug in your USB hard drive to the USB slot on your Mac, making sure it is connected with your Mac. When connected successfully, it should appear in the window or the Disk Utility window. Select it, then select the Partition heading.

Step 2. In the Partitions Layout heading, select 1 Partition from the drop-down list. Click Options, then click GUID Partition Table heading, then OK.

Step 3. Click the drop-down list for the Format and select Mac OS Extended. Name it and select Apply. Click the Partition button in the dialogue.

Step 4. When it finished for step 3, go to to download the Recovery Disk Assistant. The downloaded Recovery Disk Assistant will detect the USB drive. You need to ensure the action and click Continue, typing in the right password you have set for the Mac.

Step 5. The data will be written to the disk. Be patient and keep your USB hard drive connected firmly until it prompts to.

Step 6. To use the new recovery stick, you need to insert the USB hard drive again and reboot. Before the Apple logo appears, hold down Option and Command keys. Next, click the USB icon in the window to select it.

Step 7. When the recovery system has booted, choose the option you need. Among them, Disk Utility is the most useful tool. It will repairs errors that might prevent your Mac from booting.

Whether you restore Mac from USB hard drive or with the built-in internal recovery, it will always cause data loss. To restore the lost data back to Mac, you need to have the most powerful and useful software, iBeesoft Data Recovery for Mac, installed. It will scan your Mac to look for and recover deleted or lost photos, videos, audio files, archives, emails, documents and more. Here are some of its salient features:

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  • supports hundreds of file types, including videos, photos, audio files, documents, ebooks, archives, and more. And for each type of files, it supports almost all the file formats. For example, it supports videos in mp4, flv, avi, mov, mpeg, mkv, etc.
  • It is free for recovering up to 200MB files. If your file size is smaller than 200MB, you use it for free. It is the exclusive feature among all the data recovery tools over the Internet.
  • It is easy to use. There is a built-in simple guide. You just need to click to select the options offered in each window. No extra technique is needed for data recovery.
  • It is standalone, needing no extra software. It is virus-free and has no security issue. No data is collected. All files it found are listed only for you to choose to recover.

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Why not download iBeesoft Data Recovery to have a try?

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