How to Fix “Not Enough Space to Install macOS Monterey” Error

Do you want to clear space on Mac for Monterey? Apple recently released its new macOS Monterey version to their various devices. If you tried to update your device to the latest new release and were unable to do so due to an Error message displaying ‘Not Enough Space to Install macOS Monterey’, you should read on to find out a solution for this problem. 

Why “Not Enough Space to Install macOS Monterey” Error occurs?

Among the most common issues cropping up while updating your Apple device to the new macOS version is lack of storage space. ‘Not Enough Space to Install macOS Monterey’ error message can not steal your excitement of moving to a new Mac version, so let’s find out more about it and how to resolve it.

Obvious from the error message that your Mac does not have enough storage space to install the new macOS version. This could be for multiple reasons, but easily solvable through various methods. 

How much space does Monterey need

The installation file of macOS Monterey is about 12 GB, but ideally you will need more storage space around 4 GB to complete installation of the macOS successfully.

But according to Apple’s official support website, if you are upgrading from macOS Sierra or later versions to macOS Monterey it is advised to have 26GB of storage space available. And if you are upgrading from even earlier macOS versions to macOS Monterey then 44GB of storage is required. 

How to fix “Not Enough Space to Install macOS Monterey” Error

Listed below are the best solutions for resolving Not enough Space error messages. 

Method 1: Optimise Storage space using built in utilities. 

Use the built in Optimization techniques for your Mac. follow these steps given below –

Step 1: Go to Apple Menu> About this Mac> Storage > Manage and it will show you the current storage state on your Mac.

Step 2: Go to the Recommendations and search for the Optimize Storage option. Click on it. 

Not Enough Space to Install macOS Monterey

It will show you the Apple TV movies and shows which are unnecessarily stored on your Mac and taking up much storage than needed.

You can remove the ones you have already watched and also manage the email attachments which are no longer required to free up more space. This is the inbuilt method to clear up the storage space on Mac. 

Method 2: Clean unwanted files using third party software –

Get CleanMyMac as the Mac cleaning application to find and remove the unnecessary files to clear space on Mac for macOS Monterey.

Download CleanMyMac on your Mac. It is a multi-functional utility which comes with a range of tools to declutter Mac.  Run a complete scan of your Mac and review the junk files found on it and remove them with one click.

System Junk Cleaner

  • Remove Large and Old files –

It comes with a dedicated tool to search your Mac for large and old files which are no more needed. You can review the scan results and select the ones which can be remove to create more space on Mac.


  •  Uninstall unwanted apps –

Overtime, a number of unwanted and redundant applications make their way into your Mac. You need to uninstall them, however the manual method fails to do it sometimes. Therefore, using CleanMyMac which is one of the best app uninstaller for mac.

It removes the applications along with all of its associated files to free up a large chunk of storage space.

Cleanmymac Uninstaller

  • Clear Trash Bin –

Mac will not automatically clear the Trash and your deleted files may remain in the storage unknowingly. Here using the CleanMyMac you can clear the Trash bins for system, Photos and other apps quickly.

Not Enough Space to Install macOS Monterey

  • Clear Mail attachments –

The mail attachments often accumulate in a large number of downloaded files which are neglected. But, it should be cleared to make space for a new macOS version on your device. Use the Mail Attachments feature to find all of the attachments and clear them with one click.

Not Enough Space to Install macOS Monterey

  • Remove outdated iOS backup – 

It’s important to weed out all of the unwanted junk from your Mac in order to make space in storage space. Therefore, you can transfer your iOS data to your cloud or an external hard drive to keep it safe, But removing it from the Mac will be most recommended after that action.

Go to the iTunes Junk option and select the Cleans outdated iOS data from Mac option. 

Not Enough Space to Install macOS Monterey

Method 3: Move some data to external storage or Cloud drive

After going through all the above methods and you still don’t have enough storage space to install macOS Monterey on your System? Then as a final resolution, consider transferring a few of your not so important data to an external storage device or even better transfer it to iCloud or other cloud storages to access it over the internet.

Move the size of data enough to make space to be able install macOS Monterey successfully. 

Frequently Asked Questions –

Q1. How do I free up space on my Mac to install Monterey?

You can free up storage space on your Mac to install Monterey in various ways, such as Storage optimization, clean junk files, remove unwanted apps etc. 

Q3. How do I install OSX if I don’t have enough space?

It is advised to clear up your storage space to make room for the new macOS by removing unwanted data and applications. One can also take a backup or transfer the media files which are not required on Mac immediately. 

Q4. Why does my Mac say there is not enough disk space when there is?

If there is enough space available on your Mac, but you are still getting the error, try to run a Mac cleaning utility to clear cache, junk and other storage files. 

Conclusion On Ways To Fix Not Enough Space to Install macOS Monterey Error

So, now you know how to clear unwanted junk from your Mac to make space for the new macOS installation. You can rely on the inbuilt tools or get a Mac cleaning application such as CleanMyMac. As the third party software will work more efficiently to clear the different types of junk files on your computer. 

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Posted by
Mariya Jonsan

Mariya Jonsan is Technical Writing Expert at BestMacAdvisor who did all the research and testing of mac troubleshooting guides and different applications. She had a huge love towards Apple products and loves testing and writing about them.

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