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How to install macOS Catalina beta in its own APFS container



With the public beta out for MacOS 10.15 Catalina, you can be a thriller and will test it in progress version. But maybe you want to secure your bets. Previously, you had to partition the boot disk, which can do a lot of work, or get an external drive, preferably SSD, and install and boot from it.

However, there is a better way to have your Catalina and start it as well. There is even a path of Apple documents and recommend.

With Apple's non-brand new APFS file system replacing the long-lasting HFS +, drives are no longer organized into partitions, but volumes and containers. A container receives a pool with a fixed storage space on a station when it is configured, but containers may have several amounts. Volume divides all free space in the container without requiring any other alignment ̵

1; they grow and shrink automatically.

(Think of this as having a measuring cup with a quarter of water in it and a set of a quarter jars. Can divide the measuring cup's water in some way among the cups, including putting all the water into just one cup or pouring it from any cup back in the measuring box.)

How this works to your advantage with Catalina, that if you have enough spare parts in the main container to handle Catalina – a few tens of gigabytes, but more preferably – you use Disk Utility to add to a value in your main container, and then install Catalina in that volume. You can then use the Startup Disk preference pane to switch between your volumes without involving an external hard drive at all.

This can still be useful after Catalina is released if you want to keep a Mojave volume active for 32-bit apps that no longer run in Catalina. I will describe a strategy below for that.

Add a Catalina volume to your main container

Warning! Whenever you make changes via Disk Utility, bad things can happen unintentionally. Make sure you have an updated clone or back up your drive before continuing.

  1. Start disk utility.

  2. Make sure View> Show All Devices is selected.

  3. Select your starter drive main container in the driving list on the left. It can be called something like "Container disk2."

  4. Click the + (plus) sign above the volume button at the top of the screen.

  5. Name the volume somewhat descriptively, leave other options, and click Add.

<img src = "https://images.idgesg.net/images/article/2019/06/mac911-add-volume-to-container-disk-utility-100800683-large.jpg" border = "0 "alt =" IDG

Disk Utility allows you to add volumes to containers to share free space.

Now you can review our steps to install Catalina's public beta. Absolutely critical, you are sure to choose the new volume that has just been created. When I tried this for the first time, this volume didn't show up immediately, I needed to click View all disks, but also try the installation sometimes before I could choose my new volume. It is unclear why, but it finally worked.


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