May 15, 2020 A bootable installer for macOS El Capitan is a good idea even if your plan is to perform an upgrade install. Having your own copy of El Capitan on a separate device ensures that you'll always be able to install or reinstall it.It also helps in performing basic troubleshooting tasks, even if you have no connection to the internet or access to the Mac App Store. It’s not letting me reinstall the OS on a recovery startup. A macOS installer on a USB flash drive or a disk drive. As the only safe way to reinstall a Mac with El Capitan or earlier. Oct 29, 2019 Simply connect the USB drive you created to an open USB port on your Mac. Turn on the system or restart it if it is already on. Immediately press. Dec 26, 2017 If you booted from a functioning recovery partition, click the “Reinstall macOS” button. The installation process will begin. If you booted from an USB disk, click “Continue” to advance to the installer. You’ll be asked which hard drive you want to install to. May 25, 2016 What you can do is take out the hard drive and attach it via USB and try to boot from it. If it boots normally then the hard drive cable inside is bad. Cheap fix, new cables are less than $50 on. Make sure the bootable installer (USB flash drive) is connected to your Mac. Shut down your Mac. Hold down Option/Alt and press the Power button. The startup device list window should appear.
Apple’s macOS Catalina is out. And if you’ve done any research on the OS update, you’ve probably heard a lot about “clean installs.”
There are some definite misconceptions about “clean” installs versus regular Mac updates. In this piece, we’ll try to clear up those misconception, as well as walk you through the process of clean installing if you choose to.
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3 How to clean install macOS Catalina
What’s a clean install?
A clean install, in a nutshell, is a way of installing an operating system update that also overwrites your existing system and its data.
To break it down, that means you’ll get rid of all of your files, documents, photos, apps, and other system data when you perform a clean install. During the process, you’ll also typically install a version of the latest operating system available for your particular computer.
In other words, it’s deleting your computer and installing the next update on top of a clean system.
As an end result, you’ll be left with a “fresh” computer that basically feels like new. But you’ll also need to re-input all of your data, files, apps and settings — just like when you first got the computer.
According to some users, there are some tangible benefits to a clean install on any operating system.
Whether that’s actually the case across the board is up for debate. When it comes to macOS Catalina, however, there may be a few reasons why you’d want to.
Why clean install macOS Catalina?
Some users recommend a clean install every time you update to a major operating system update (macOS Mojave, macOS Catalina, etc.).
Whether this is actually really necessary on a Mac is really up to personal opinion (despite what some would say). We recommend doing some research on the fact.
But, if you’re a fan of a “clean-feeling” system and you don’t mind spending some time getting your settings and data back, then a clean install doesn’t really have any significant downsides.
Of course, for most of us, time and effort are resources in short supply. It’s just not worth the annoyance and additional work to get a brand new system back to the way we operated originally.
With that in mind, there many be other reason to clean install macOS Catalina.
For one, macOS Catalina may be a fairly buggy piece of software. If you read reports of users during the beta testing cycle, you’ll see plenty of anecdotes reporting that it was a bug-ridden operating system — and that many of those bugs are still present in the final version.
Additionally, macOS Catalina drives the final nail in the coffin for 32-bit apps. They won’t run at all on Catalina. If you perform a clean install, you won’t have to worry about legacy software hanging around on your Mac. You can simply start fresh.
In a nutshell, it comes down to the following argument. Some users are clean install advocate, saying they’ll result in less buggy software. macOS Catalina itself is said to be fairly buggy, in addition to problems with app compatibility and the end of 32-bit software.
To put it another way, some users may want to clean install macOS Catalina when they would normally just perform an App Store install. You may be better off because of it.
How to clean install macOS Catalina
If you search for “clean install macOS Catalina” on Google, you’ll find tons of articles walking user through the process of creating a bootable USB drive with an installer image source from Mac App Store.
In the past, this may have been necessary. But recent versions of macOS Recovery actually let you reinstall the latest version of macOS from the internet — no flash drive or Terminal commands needed.
Of course, some purists may disagree that this will lead to the same end result. But, if you listen to realists, the end result is going to be basically the same.
We recommend going with this method if you choose to clean install simply because it’s easier (and you don’t need to have a USB flash drive handy).
Note: Make sure to back up all of your important data. This method will wipe all of it from your computer’s disk.
First off, ensure that your Mac has an internet connection — it’ll be necessary for this process.
Once you know you have everything backed up, power down your Mac.
Next, power up your Mac and immediately hold down Option + Command and R.
At this point, you should see a spinning globe icon. Once you do, release the keys.
You may also need to enter your administration or firmware password.
Now, you should see the macOS Utilities menu. Select Reinstall macOS from the options.
If performed correctly, this method will reinstall the latest version of macOS from Apple’s servers.
As of the writing of this article, that means you’ll get macOS Catalina.
Mike is a freelance journalist from San Diego, California.
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While he primarily covers Apple and consumer technology, he has past experience writing about public safety, local government, and education for a variety of publications.
He’s worn quite a few hats in the journalism field, including writer, editor, and news designer.
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Upgrading your Macbook is a very easy task if you are already running a previous version of Mac OS X. You just need to download the new OS Installer from the App Store and after that, it’s just like a normal installer setup. But the problem comes, when your Mac OS got corrupted and you need to install a clean setup without having to access the App Store.
Arguably, Mac OS is a more stable and reliable OS as compared to Windows. It crashes less and gets fewer malware attacks as compared to windows. Therefore there are very few documentations regarding clean installation for Mac OS relative to Windows Reinstallation.
In this tutorial, I would try to cover up as much detail I could to help you Reinstall a Clean Mac OS on to your Macbook or iMac. I recommend you to use 16GB or higher USB drive. Also, make sure to backup all your files and data before you initiate the setup.
Watch Video Tutorial
Step One: Download macOS Installer files
You can download the Mac OS Installer file from App Store. Or, if you don’t find the required OS on the App Store, then you can download the Mac OS Installer files from ISORIVER.
Step Two: Formatting Your USB Flash Drive
You can create a boot installer for macOS on Mac. If you are using a flash drive that already has data, be sure to back up all important files as you are about to erase everything in an instant.
Open search engine. Go to Applications > Utilities and open Disk Utility. You should see your flash drive in the External section of the left panel. After selecting it, click on the “Erase” button at the top.
Choose a descriptive name (which you will use later) and be sure to select Mac OS Extended (Journaled) for this format. Finally, click on Erase and you will be done with this step.
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Step Three: Creating a Bootable USB Using DiskMaker X
DiskMaker X is a user-friendly and reliable software for creating a bootable macOS USB disk. You can download DiskMaker X for free.
Reinstall Mac Os X From Usb
After Installing DiskMaker X, you need to change security permissions for the app to work without breaking.
Navigate to System Preferences > Security & Privacy > Privacy > Accessibility. To make changes, click the lock icon at the bottom and enter your credentials.
Then click on the Plus button, navigate to the Applications folder, select DiskMaker X, and click open. DiskMaker X should now appear on the list.
As soon as you start DiskMaker X, you will be asked to confirm the download of the macOS installer.
The following message shows one of the advantages of DiskMaker X, as it is possible to create multiple installation disks. This means that you can create multiple partitions on the USB drive and have different macOS installers for each partition.
If you prefer to create an installation disk, select “Erase all disk“. Finally, confirm that you want to delete the entire contents of the USB drive.
DiskMaker will continue to create the disk in the background and update it while it works. After a few minutes, DiskMaker X will inform you that your startup disk is ready and will give you some instructions on how to use it.
Step Four: Booting Your Mac From a USB Drive
Simply connect the USB drive you created to an open USB port on your Mac. Turn on the system or restart it if it is already on. Immediately press and hold the Option (Alt) key on the keyboard when it starts.
You should now see an option to select the USB drive as a boot disk. Once selected, the system will start from the USB drive and will be directed to the macOS utility screen.
Watch a Video Tutorial
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That’s it for the tutorial If you face any issues or had any query then please let us know in the comment section below. You can also send us an email via the contact us page for personalized support.