Feb 27, 2021 Once finished, you'll find in your /macOS-Installer/ folder a DMG containing the macOS Installer, called InstallmacOS11.1-20C69.dmg for example. Mount it and you'll find the installer application. Note: We recommend to move the Install macOS.app into the /Applications folder, as we'll be executing commands from there. May 18, 2018 Now copy this InstallESD.DMG as you need it in TransMac to Create macOS High Sierra Bootable USB Installer on Windows 10. Ok, so lets continue with TransMac Restore Disk Image to Drive. On this screen, select the InstallESD.DMG file and click OK. Much like prior versions of Mac OS, you can easily create a bootable install drive for MacOS Mojave 10.14. These boot install drives allow for things like easily formatting a Mac to perform a clean install of macOS Mojave, installing macOS Mojave onto multiple Macs without them each having to download the installer, or even as a troubleshooting tool since it can be booted from by any. Nov 13, 2017 With this handy bootable USB installer, you can reinstall macOS without much trouble. If the time comes to use this tool, insert it into the USB C port and boot the machine while holding down the.
Create a macOS High Sierra (10.13) bootable installer USB stick (including starting from the 19MB installer stub). This technique does not require any third party tools unlike the OSX daily post below. It does require access to a Mac in order to use the App store and use of Terminal. Step by step procedure.
Apple has just released the final version of macOS Big Sur to the public. You can start upgrading your compatible Mac devices by downloading Big Sur from the App Store or Settings > Software Updates. But if you prefer to completely wipe out your Mac and do a fresh install of macOS Big Sur, you will need a bootable media.
I perform a fresh install every time Apple releases a major macOS version – which usually happens once a year. This time too, I will update my Macbook Air by performing a fresh install. And to do that, I will make a bootable SD card. You can also use a USB stick aka pen drive aka flash drive and perform a fresh install.
In this quick tutorial, I will share how I make a bootable macOS memory card or USB stick, wipe my Mac, and perform a fresh install. You will need a stable internet connection and a storage media with minimum 16GB space. Before you begin, make sure you have taken backup of your Mac.
Step 1: Download macOS Big Sur
Open App Store and search for macOS Big Sur. Click Get and the Software Update window will open. Click upgrade now and it will start downloading the macOS update. If you don’t see macOS Big Sur in App Store, follow this link and choose open link in App Store.
The installer is 12GB so be patience.
Once it finished downloading, the macOS installer is placed under Applications and will run automatically. Close the setup window.
Step 2: Preparing the Storage Media
Insert the storage media you would like to use. I use a 64GB micro SD card with my MacBook Air. You can use a USB-C to USB adapter for Mac models without USB A ports and memory card slot.
Open Disk Utility.
Select the storage medium you just connected from the list on left and click Erase. Select Mac OS Extended (Journaled) from Format dropdown. Type BigSur or any other name you like. Make it simple because you will use this name in the next step.
Click Erase and wait until the media is erased.
Step 3: Making the Bootable Media
Now open Terminal and type the following command. Make sure you don’t leave any spaces. Replace BigSur with whatever name you chose in Step 2.
Press enter.
Enter your password, type Y and press enter again. The process takes roughly 20 minutes. After it’s finished, you will notice that the name of your USB stick/SD card has been changed to Install macOS Big Sur.
Step 4: Installing macOS Big Sur from Bootable Media
Right. Now you have a Big Sur bootable media. It’s time to start the installation process.
Restart your Mac. When it’s booting up (right after the chime sound), press and hold Option key until you see a screen with an option to select the startup disk.
Select Install macOS Big Sur and click continue. Let the installer load.
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Now you will see the macOS Recovery screen which will ask you to select a user account which you know the password of. Choose your administrator account and enter password. Note that this is the user on your current macOS setup.
Click Disk Utility and continue. Select the volume where macOS is currently installed on your Mac. Click Erase. Leave all options as default. Click Erase again.
After the process finishes, close Disk Utility and you will return to the recovery screen. Choose ‘Install macOS’ this time and click continue.
The macOS installation process will start and your Mac will reboot a few times.
Once finished, you should see the macOS setup screen. After you are done with onboarding, you will see the desktop and are all set to start using macOS Big Sur.
Macos Bootable Installer From Windows
The same bootable media you just made can be used to install macOS Big Sur on all your (compatible) Macs. This approach helps save bandwidth if you have more than one devices while also letting you erase all data and perform a clean install. It will also come in handy as a recovery media if your Mac software misbehaves in future.
That’s all, folks. This was a tutorial on making a bootable macOS Big Sur installation media. I hope you found it useful and I’d like to thank you for reading.
Support Me: If this article/tutorial helped you today, please consider supporting me and help me run techstuffer.com.
Apple released macOS Big Sur on November 12, 2020. macOS Big Sur continues the list of Central California landmarks as well as marks the new operating system for Mac. Those who tried it say that it’s more stable. It also sports a refreshed version of Safari that is 50% faster than Chrome. Here’s how to perform a clean install of macOS Big Sur with pictures and helpful tips along the way.
What is a clean install? (Big Sur or any other macOS)
Macos Bootable Installer
A clean install means that you install the macOS onto the erased drive.
Why is clean install more preferable?
A clean install is the opposite of macOS upgrade. You format your hard drive, and therefore, it keeps no leftovers from the previous macOS.
- macOS performs faster
- You get rid of apps you don’t use
- Persistent issues may go away
Basic steps to clean install macOS Big Sur
The first step is to clean and back up your Mac to some external source. Then, you’ll need to download macOS Big Sur package to your Applications. Next, you’ll need to create a bootable USB installer (involves another external drive). And lastly, we’ll use Disk Utility to erase your Mac and install macOS Big Sur using the bootable USB device.
1. Clean & Back up your Mac
Cleanup
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Cleaning your Mac is generally a healthy practice but since we’re about to back your Mac up, it’s worthwhile to get rid of system junk first. After we’ve cleaned your Mac, you’ll end up with a refreshed system ready for a Time Machine backup.
Time Machine will make a snapshot of your system.But before that we’ll ensure there's no unwanted leftovers on your entire Mac. To clean your machine automatically, you can run CleanMyMac X. This tool is one of the best-known cleaning utilities for Mac, and it’s been notarized by Apple.
Download the free version of CleanMyMac X cleaner here.
Install the app and click on System Junk to perform the scan.
Back up your Mac
Now, you’re ready to back up your computer. There is a tool built just for that purpose, you guessed it, Time Machine. Time Machine needs a storage source onto which it will copy your system.
So, you’ll need an external drive. This is the first external drive that we will use to clean install macOS Big Sur. This is the reserve backup for the worst-case scenario.
- Go to System Preferences > Time Machine.
- Connect an external drive (that’s more spacious than your current system).
- Select this Disk as a backup source in Time Machine.
Well done. The preliminary steps are done with, and we’re ready to clean install macOS Big Sur.
2. Download macOS Big Sur installer
macOS Big Sur has been released on November 12, 2020.
Since the public release in the fall of 2020, macOS Big Sur can be downloaded from the Mac App Store. It also can be found in the Software Updates pane in System Preferences.
So you’ll find it in System Preferences > Software Updates.
- Click Upgrade Now
Wait for the installer to download onto your drive. You will see the macOS Big Sur intro screen.
Don’t click Continue but for now, close this window by choosing Quit Install.
We only want to make sure that the app called Install macOS Big Sur.App is now firmly sitting in your Applications.
This is the file we’ll use later to run the clean install of macOS Big Sur via Disk Utility.
Now, and only now have we come to clean installing macOS Big Sur. This is only a short stop on the road, so catch your breath, and let’s move along.
3. Create a bootable Big Sur installer
Now, it’s time to grab another USB flash drive and connect it to your Mac. This drive should have at least 16 GB of storage space.
Wipe the drive clean with Disk Utility
- Pick this drive and click Erase in the top menu.
- Double-check what you’re erasing.
- Make sure the USB drive is shown as “Untitled”
- Under Format, choose: Mac OS Extended (Journaled)
All data on that disk will be lost, so beware.
Go to Terminal (Phew, we’re almost there)
This step will actually create the source disk so we can install Big Sur from bootable USB.
Launch Terminal app from your Launchpad.
Paste in the following command:
sudo /Applications/Install macOS Big Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled
Type in your admin password and press Return and Y to confirm the action.
This command creates a bootable USB installer based on macOS Big Sur.app, which we’ve previously placed in your Applications.
4. Erase your startup drive in Disk Utility
It’s time to wave goodbye to your current configuration. Remember, we’ve already cleaned it up from junk with CleanMyMac X and backed it up onto our first reserve USB drive.
Now, start your Mac in Recovery mode:
- Turn off your Mac and hold down Command + R.
- Choose Disk Utility from the menu.
- Choose your main startup drive and click Erase.
Voila! Your Mac is now formatted. What you can do now (actually, this the only thing you can do now) is to clean install macOS Big Sur 11 from the connected USB installer drive. If it’s not connected, connect the bootable USB installer now.
Mac Os Bootable Installer
- Go back to the original Disk Utility screen
(If you can’t return to Disk Utility, restart your Mac and hold down the Option key) - Click Install macOS and choose to install it from the selected USB drive.
- Click on “Install macOS”
How do I regularly install macOS Big Sur?
The regular install is done via upgrading your current macOS. That is, you don’t erase your entire disk. When the new macOS Big Sur is officially released, you just open the App Store > Updates.
Or even better, go to your System Preferences > Software Updates
How to reinstall macOS Big Sur?
If for some reason your Big Sur macOS doesn’t work as expected, you can reinstall it by sending your Mac into Recovery Mode.
- Restart your machine and hold down ⌘ + R
- Choose Reinstall macOS
That’s it.
Mac Os High Sierra Bootable Installer
As we’ve just seen, running a clean install of macOS Big Sur could be a crazy rabbit hole. We hope you survived. Now you’ll be rewarded with the best Apple’s operating system up to date. You’ll also have a clean Mac that works at blazing speed with a little extra help from our favorite Mac cleaner — CleanMyMac X. You can get started with a trial version — so download it here.