Check your free storage space. The download is big - around 6.5GB - and Apple said you should probably have about 20GB of free storage space to install Catalina. The macOS Catalina installer macOS is about 6.5 GB and Catalina takes exactly 18.5 GB on your hard drive. How Much Space Do You Need for Catalina? The macOS Catalina may take 18.5 GB space on your hard drive, but to operate it properly, you will need more than 20 Gb disk space.

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by Sophie GreenUpdated on 2020-05-27 / Update for Mac OS

While macOS Catalina 10.15 is the latest update to the macOS line-up and users are eagerly waiting to install it, some issues are holding back some of the users. Some users get 'Not enough free space on your disk to install macOS Catalina' error message.

So how much free disk space do I have for macOS Catalina 10.15? How many GB is OS Catalina? What to do if you failed to install macOS Catalina due to low disk space? Don't worry! Get the Answers here.

Question 1. How Many GB is OS Catalina?

The accurate answer is 18.5 GB. The macOS Catalina installer macOS is about 6.5 GB and Catalina takes exactly 18.5 GB on your hard drive.

Question 2. How Much Space Do You Need for Catalina?

The macOS Catalina may take 18.5 GB space on your hard drive, but to operate it properly, you will need more than 20 Gb disk space to clean install Catalina.

If you're performing an upgrade install, you need to make sure the startup drive have about 6.5 GB of space to download the macOS Catalina installer and room for the files the installer will copy to the startup drive during installation. You'd better have 25 GB of free space available.

Question 3. Does Catalina Take up More Space?

Yes, it does take up more space. So, the iCloud based storage works best with Catalina as it provides 5 GB free storage space.

Question 4. How to Fix “Not enough free space on your disk to install macOS Catalina”?

If you encounter such a low space issue while installing macOS Catalina or macOS Catalina installation failed due to low disk space, then you need to free up space on your hard drive. You can put the Mac in Recovery Mode and execute steps to free up space. You can check out the steps below.

• Reboot Mac and hold 'Control + R' while it boots.
• The Mac will enter Recovery Mode.

• Then, click 'Disk Utility' to repair or erase a disk.

• In Disk Utility, select your Mac's hard drive from the sidebar.

• Select First Aid to checks the file system for errors. Reboot your Mac when it finishes and you can go on to free up space on your Mac.

• If you have a recent backup of your Mac or don't mind losing data. Click the Erase button and confirm you want to erase your Mac.After freeing the required space, you will be able to install macOS Catalina successfully. Click the Erase button and confirm you want to erase your Mac.

Bonus Tip: How to Recover Lost Data If Your Mac Stuck on Catalina Update and Won't Boot?

Mac fails to boot or start after the macOS update? Catalina get stuck for some reasons? Before fixing your stuck Mac, the first thing is trying to save your data Tenorshare 4DDiG for Mac Data Recovery provide a tried-and-true data recovery service for you to recover data from unbootable Mac after update. It creates a bootable media that enables you to recover data from Mac hard drive/ failed internal Mac hard drive, APFS boot drive, and unmountable APFS boot volume, etc.

• Download and install UltData on any computer.

• Then, launch the program and select 'Recover Data from Crashed System'; click 'Start' to proceed.

• Connect a USB drive to the Mac, and click 'Start' to create a bootable drive.

• Connect the bootable drive to crashed Mac and boot it while holding the 'Option' button.

• Once you are in the disk selection menu, release the button, and select 'UltData – Mac' to boot the disk. When you have entered the system successfully, click 'Export'.

This is the extremely simple recovery method implemented by Tenorshare UltData-Mac Data Recovery. It won't take more than a few minutes to get back your deleted files.

Finally

Well, macOS Catalina takes up more space on your hard drive than usual. And even after the installation, the OS expands. Macos 10.12 download iso. So, it is essential to free up the required space so that Catalina can operate properly. So, if you are having a disk space issue, use the steps we have detailed on the article and clear up space on the Mac. While it is difficult to recover data from a crashed computer but if you use Tenorshare 4DDiG for Mac Data Recovery, you will be able to recover data even from a crashed Mac computer.

If you install macOS on an additional volume of your startup disk, you can switch between that macOS and the macOS on your other volume, as if each were on a separate disk. And because storage space is shared across APFS volumes, you don't need to reserve space for the new volume. Its size automatically adjusts to fit your content.

What you need

Your Mac must already be using macOS High Sierra or later on an APFS-formatted startup disk. Find out which format your startup disk is using.

You don't need to reserve storage space for the new volume, but macOS needs as much as 20GB of available space to install, depending on the version of macOS. If you don't have enough space, the installer will let you know.

About This Mac includes a storage overview: Choose Apple () menu > About This Mac, then click Storage.

Back up your Mac

It's a good idea to back up your Mac first, especially if you're installing a beta version of macOS. Beta software is software that is still in development, so some apps and services might not work as expected.

Then, click to open the SD card hard drive, and you will come across two files. Use an SD card reader to connect the SD card to your laptop. How to download gopro footage to mac. They are the “DCIM” and the “MISC” folders.The photos are located within the DCIM folder, which you can easily transfer to your laptop. Once connected, the SD card will appear on your desktop.

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Add an APFS volume

1. Open Disk Utility, which is in the Utilities folder of your Applications folder.
2. In the sidebar, select your existing APFS volume.
3. Choose Edit > Add APFS Volume from the menu bar, or click in the Disk Utility toolbar. These options are available only when an APFS volume is selected.
4. Type any name for the new APFS volume, then click Add:
   
5. Disk Utility should now show the new volume in the sidebar. The new volume will also appear in the Finder, as if it were a separate disk. You can now quit Disk Utility.

Install macOS on the volume

Choose an installation method:

• To install a beta (prerelease) version of macOS, enroll in the Apple Beta Software Program and follow the installation instructions on the program website.
• To install a release version of macOS, you can use macOS Recovery. The keys you press at startup determine which macOS is installed.

When the installer opens and you're asked to choose where to install, click Show All Disks, then select the new volume.

Switch between macOS versions

How To Install Macos Catalina

After installation is complete, you can use Startup Disk preferences or Startup Manager to quickly switch between each macOS:

Requirements To Install Macos Catalina

• Choose Apple () menu > Startup Disk, then click and enter your administrator password. Select the volume that you want to use, then click Restart.
• Or press and hold the Option key during startup. When prompted, choose the volume that you want to start up from.

Macos Mojave Catalina Download

Keep the macOS on each volume up to date

To find the latest updates for each version of macOS, check for software updates, then start up from the other volume and check for software updates again.

Learn more

Macos 10.15 Catalina Download Link

If your Mac is using macOS Sierra or earlier, or the startup disk is formatted as Mac OS Extended instead of APFS, you can create a new partition instead. The space it occupies doesn't automatically adjust to fit your content, so you must manually size the partition. Learn how to add a volume to a device formatted as Mac OS Extended.

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