Top Tips to Resolve “Unable to Save Message to Disk” Error in Outlook For Mac

Do you face various issues with Outlook for Mac as well? Among these errors is “unable to save message to disk.” We’ll help you with our comprehensive tutorial. Additionally, we will provide you with an app that helps streamline the procedure. Continue reading to learn more.
One of the most widely used mail clients for managing communication demands among professionals as well as enterprises is Outlook for Mac. Even with its vast user base, the application is far from flawless. Users who frequently face numerous flaws, problems, and errors keep it under close scrutiny.
The “Unable to save message to disk” error is one of the most frequent issues Mac users experience. When a user wants to save a new message or attachment, this annoying error message usually displays and stops the user from saving the message as well as attachment to their pc.
Users have noticed that whenever they want to use the latest edition of Outlook, the issue generally arises on the newest Mac OS editions. This error causes a pop-up to show when Outlook is still running in the background.
We’ll talk about the reason behind the error and how to resolve it in the following article.
Error Details “Unable to Save Message to Disk”
Error Name | Unable to Save Message to Disk |
Error Type | Runtime |
Short Description of Error | Pop-up box showing the message “Outlook was unable to Save Message to Disk” |
Signs of Error | Pop-up box starting Mac Outlook unable to save message to disk with options to Try Again or Dismiss |
Application | Outlook for Mac |
Why This Error Occurs

In other words, the error “Unable to Save Message to Disk” is a runtime issue. This kind of mistake happens when Outlook is running or executing and has several possible causes, such as:
Insufficient Storage Space– A common reason for this problem on Mac machines is insufficient space on the disk. Insufficient hard disk space prevents the message or attachment from being saved, resulting in the error message appearing.
The answer? Make a space on your computer. If necessary, utilize an external drive.
Inexact Outlook Settings– This error message may appear if your Outlook settings are wrong. This generally occurs when you try to save the message with the incorrect account or when your account settings are not set up correctly.
The answer? When saving the message, make sure your account settings are correct and that you’re using the right account.
Corrupted Outlook Identity– The error message can sometimes appear due to a corrupted Outlook identity. A virus attack or a bug in the software may be the cause of this.
The answer? Take the following steps to fix the corrupted Outlook identity: Choose your identification under File > Database Utility > “Rebuild.”
Outdated Outlook Edition– The error message can be appearing if the Outlook Mac edition is outdated.
Now that you’re aware of possible reasons for this error, you also need to be aware of its effects. In fact! Other negative effects that this error may cause for your Mac are as follows:
- This causes a decrease in internet speed
- Causing irregular functioning of your device
- Causing the failure of other Microsoft Office programs
It is not a sign of a virus of any type if you encounter this error together with any of the above-mentioned side effects. It is crucial that you respond right away since runtime issues can also be caused by badly written code or a compatibility issue with a different program that interferes with the application.
How to Fix the Problem?
After completing extensive research and analysis on this problem, we found these 4 possible fixes.
#Fix 1- Navigate to Apps and remove the Outlook program. Check out if the problem remains after reinstalling the program.
#Fix 2-
- Check out if Outlook is running in the background by using the “Activity Monitor” application.
- To force stop the Outlook process, hit on it and then press the “X” symbol.
- Restart Outlook once again to see if it resolves the problem.
#Fix 3- Go to the Microsoft support website. To find out what generates this error and to get their official response on how to fix it, start a chat with their tech support.
#Fix 4- The following guide will help you fix runtime errors, even if it might not be the most effective or precise solution for your specific issue. It has been successfully used to resolve a number of Mac problems, so you should give it a try if none of the above options work:
Step1- Close any Programs or Applications that may Cause Problems with Outlook.
Conflicting applications can frequently cause errors such as “Unable to Save Message to Disk.” By closing these programs, you can fix this problem. In order to terminate these applications, you would need to launch the Activity Monitor, pick any processes that look suspicious, and force-quit them by pressing the “X” icon located in the upper-left corner of the window.
Step2- If you think a Program is Problematic, Update it and Reinstall it.
To uninstall a software, go to Applications and drag its icon to the Bin. Go to your AppStore and select the “Updates” option to find out if any updates are available.
Step3- Install the Most Recent OS Edition.
To check for any available Mac OS updates, navigate to System Preferences → Software Update. There will be an installer button shown if there is an update available.
Step4- Optimize and scan for problems on your machine
Your last option is to examine the machine for the following if you’ve attempted all of the solutions listed above and the problem continues to exist:
- Viruses
- Untrustworthy files
- Redundant program
- Cookies and other items being tracked
- Browser hackers with Adware
- Computer errors causing it to slow down
Final Words
As a Mac user, the “Unable to save message to disk” challenge can be actually annoying since it keeps you from storing new messages or attachments. But you should be able to solve the issue by understanding the main cause and applying the previously mentioned fixes into practice. It might be preferable to get in touch with Microsoft support if none of these fixes resolve the problem.
We provided the simplest fixes for each of these difficulties in this blog. However, you can use CubexSoft OLM to PST Converter to save OLM files data if you’re unable to save message to disk. It is the simplest and quickest method for creating a backup or portable PST file of your essential notes, contacts, calendar, emails, notes, and other data. To convert your present Mac Outlook OLM mailbox data into Windows Outlook PST format, I’d recommend using a professional software like OLM Converter. Moreover, it enables direct conversion of the OLM files to 15 file formats or email clients with ease.
