Install Mac Os Catalina On External Ssd


Click the Partition tab. Click the plus ( +) button below the pie chart. In the Name: field, type a name for your new partition. In the Format: field, use the dropdown to select a Format for the. Factory OS on my iMac was High Sierra, file system of my external SSD is Mac OS Extended. I wanted to update to Mojave but then I learned that there are some issues, because Mojave needs APFS file system, and because of that computer with external SSD can work and boot slower.

I am trying to install 10.15. beta on a Samsung T5. My configuration - MacBook Pro (15-inch, 2019) running 10.14.5 (18F203).

  1. But when it comes to macOS Catalina, it may be a good idea. 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.
  2. Select the external disk in the list on the left. Disks appear flush left in the list (volumes are indented below disks). On the right, check if the description below the disk name mentions GUID Partition Map. If it doesn’t, you need to reformat the external disk before you can install macOS on it.

I downloaded the Catalina beta, followed the instractions (

listed below (RTest is the name of my SSD drive)

sudo /Applications/Install macOS 10.15 --volume /Volumes/RTest&& echo Catalina Boot Drive Created

The start disk is created, it runs for 12 min the installer, asks for restart, and the tries to recover via Internet, and finally dies with the error -9000F.

What can I do?'

Sep 08, 2021 • Filed to: Solve Mac Problems • Proven solutions

The macOS Sierra is a wonderful operating system - and easily the best for all Apple computers and laptops. If you have a Mac, then you probably cannot wait to get your hands on the Sierra - provided your system supports it. However, even if your Mac does support Sierra, there may be a few reasons as to why you may not be able to install it on your hard disk.

Install Mac Os Catalina On External Ssd Disk

For starters, it takes around 8GB of storage space. While that is the minimum recommended by Apple, you will probably need a bit more to make use of it. In addition to that, if you are using an older Mac, then you will still face a few issues while running Sierra. You also have to back up the entire system before installing macOS Sierra, which is a must-do step in any update. For those who have a lot of data on their Macs, this can be a very lengthy procedure.

However, there is a solution to all of that. You can simply go ahead and install the macOS Sierra on an external hard drive, and then boot your Mac from that!

The Prerequisites

There is no doubt about the fact that you will save a lot of trouble and hassle if you install the macOS Sierra on an external drive. It will even let you use the same hard drive with multiple Macs, without updating to Sierra on each of those. However, to begin with, this, you will need an external hard drive. Since Apple only requires you to have a little over 8 GB of free space, any hard drive, even one with 128 GB, will do just fine. For better performance, it is recommended that it be an SSD.

Install Mac Os Catalina On External Ssd
It must be better if you can format the external hard drive beforehand to make it compatible with your Mac.

You will also have to download macOS Sierra from the Mac App Store. To do that, just open the App Store on your Mac, and search for macOS Sierra. You can also download macOS Sierra by directly clicking on the link from your Mac. If your Mac is compatible, then the download option will appear. Click on it, and the download will begin.

The download size is around 5GB, and the total time may vary depending on your internet connection as well as Apple’s servers.

Once you have a hard drive, you can go ahead and follow the simple steps to install and use macOS Sierra from your external drive.

Part 1. Installing macOS Sierra on the external drive

1. Preparing the hard drive for the installation

Before you install macOS Sierra on the hard drive, you will need to clean the external device. Ensure that there is no important data on your hard drive. Then plug it into your Mac, go to Finder, and select Applications.

From Applications, go to Utilities and from there, find and double click on Disk Utility. In the Disk Utility tab, select the external hard drive that is connected to the Mac, and then click on Erase at the top.

Install mac os catalina on external ssd

Now rename it to something like sierra that you will remember, choose 'Mac OS Extended (Journaled)' in the format, and then click on Erase. Once the process completes, click on Done, and you are ready to begin the installation.

Install mac os catalina on external ssd disk

2. Creating the bootable drive

Install Mac Os Catalina On External Ssd Drives

Once your hard drive is formatted, you will need to turn it into a bootable drive. Before you begin this, you will require the Administrator access on your Mac.

Related: Wanna access Mac data without reinstalling it? Go there and boot Mac up to recover data easily.

Step 1 Go to Finder to open the window, and from the left side, select Applications.

Step 2 From the application's Window, find and click Utilities, and from there, go to Terminal.

Step 3 Now, remember the name that you set for formatting your external drive (i.e. sierra). In case you named it something other than sierra, then make the appropriate changes in the following text. Once you are in the terminal, enter the following text, ensuring to use your drive’s name wherever Volumes/Sierra is written.

sudo /Applications/Install macOS --volume /Volumes/sierra --applicationpath /Applications/Install macOS –nointeraction

Step 4 When you tap enter, you will be asked the password for the administrator account. As you type the password, no text will be there in the terminal window. Depending on the drive, this process could take a while. Once the window reports ‘Done’, you can close the drive.

Mac Os Catalina Download Installer

Part 2. Using macOS Sierra with the Bootable Hard Drive

Once the above step completes, your external hard drive will be ready to run macOS Sierra on any compatible Mac. First, you have to turn off the Mac on which you want to run Sierra from the bootable drive. Then, before switching it on, connect the drive through the Mac’s USB Port.

Then turn on your Mac, and as soon as you hear the startup sound, press the Option key and keep it pressed. Within a few seconds, you will get a screen that asks you to select the appropriate hard drive for booting. On this screen, select the one on which you have installed macOS Sierra, and you will soon have your Mac running Sierra!

How To Install Macos Catalina On New Ssd

Install Mac Os Catalina On External Ssd

Thus, as you follow these simple steps, you will have configured the macOS Sierra to run from an external hard drive. You do not have to worry about how much free space there is in your Mac or anything else of the sort. Through this approach, you can run macOS Sierra on any compatible Mac without having to separately download and install it on either one. In addition to that, since there are no backups of the mac’s hard disk required, the process will involve comparatively less hassle.

Install Mac Os Catalina On External Ssd File

Any changes or files that you make can be stored on your Mac as well, so you do not have to worry about where your data is. This can be a great way to have the same OS on your personal as well as work Macs. Thus, now, you do not have to bother about freeing up your Mac’s drives or separately downloading it for every PC in the house- just configure it once on an external hard drive, and everything else is taken care of!

Whenever and however you lost your data, keep it in mind that you're able to retrieve data back from Mac by the means of data recovery software like Recoverit. It is the data recovery tool to help you retrieve all kinds of data from various devices.

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