How to Change Mac Outlook from Legacy to New Outlook?
Published: August 5th, 2025 • 6 Min Read
Microsoft has announced that support for Legacy Outlook will end in October 2025, which means no longer updates or security fixes after that. So, it’s recommended to change Mac Outlook from Legacy to New Outlook to adjust early and avoid potential issues later.
If you’re using Outlook on your Mac, you may have been sent a message or toggle about the New Outlook. Microsoft is phasing out the older version called Legacy Outlook and encouraging everyone to switch to the updated one.
This new version looks different, works faster and is designed to better fit with other Microsoft apps like Teams and OneDrive. But change can be confusing especially if you are using an old layout and version.
Why Switch from Legacy to New Outlook Mac?
- New Outlook is built with New Technologies, which means it loads faster, feels smoother and crashes less as compared to older versions.
- The new Outlook Mac offers a simple layout that makes it easier to read emails, manage your calendar and find what you need especially if you use other Microsoft apps like Word, Teams or OneDrive.
- If you’re using a Microsoft 365 account, The New Outlook accounts connect more seamlessly with your files, calendar invites and contacts.
- The updated version of Outlook offers pinning important emails, snoozing messages, unified inbox view, improved search with Microsoft search and more.
Legacy Outlook vs New Outlook for Mac
| Features | Legacy Outlook | New Outlook for Mac |
| User Interface | Older, more cluttered | Clean, modern or easier to navigate |
| Performance | Slower load times, more crashes | Faster, smoother and more stable |
| Search | Basic search, sometimes slow | Powered by Microsoft Search(much faster and more accurate) |
| Unified Inbox | No | Yes- view all emails at one place. |
| Pinned Emails | No | Keep important messages at the top. |
| Snooze Emails | No | Yes hide emails and get reminded later |
| Categories and Tags | Fully customizable | Limited(some features still missing) |
| Shared mailboxes | Supported | Not fully supported in all cases(still improving) |
| Add-ins | Most third-party add-ins supported | Limited add-in support(some not yet available) |
| Offline Access | Full Support | Yes |
| Integration with Microsoft 365 | Basic | Deep Integration with Teams, OneDrive etc. |
| Customization | More options | Fewer options, simpler layout |
| Calendar Feature | Fully featured | Clean calendar view, but some advanced features missing |
How to Switch from Legacy to New Outlook Mac?
- Launch Mac Outlook(Legacy Version).
- Look for the New Outlook toggle at top-right corner and click on Turn On.
- Outlook will restart and open in the New Outlook layout.
- You may be asked to re-add your accounts(especially if using IMAP or Non-Microsoft Accounts).
- Let Outlook sync your emails and calendar. This may take a few minutes.
How to Revert Back (Legacy) After Switching?
- In New Outlook, click on Help Menu at top.
- Choose Revert to legacy Outlook.
- Outlook will restart and return to the old version.
- You may need to sign in again and reconfigure your account settings.
How to Switch From Legacy to New Outlook Mac?
If you want to change outlook from legacy to new Outlook Mac then we recommend you to choose BitRecover OLM Converter as this software can easily handle any number of Outlook for Mac files and also offers maintained results as appear in the resultant file. This tool can easily transfer all Legacy Outlook data in New Outlook Mac without facing any limitations.
Steps to Change from Legacy Outlook to New Outlook Mac
- Download and open Recommended Wizard on your system.
- Click on Select files to browse OLM files as you wish to convert.
- Preview to select Outlook folders and hit on Next option.
- Choose the PST file in the list of Saving options.
- Browse destination path and tap on Next button.
Useful Features of Recommended Software
- This software offers to convert OLM to PST, PDF, MSG, EML, and 25+ saving features.
- It offers a simple initiative interface to make it a reliable utility to operate by all professional and individual users.
- With this wizard, you can also use filter options such as date range, subject, sender, and more.
- It also supports extracted mode for corrupted OLM files and also marks corrupted folders in read colour.
- With this wizard, you can also import OLM to Thunderbird, Office 365, Zimbra and more.
Enterprise/Admin Considerations for the Switch on Mac
- Check user accounts and mailbox types(some shared mailboxes or IMAP setups may break).
- Train employees on the new Mac Outlook interface and changes.
- Update or test Third-party add-ins and integrations as required.
- Use Microsoft Endpoint Manager to manage Outlook policies and toggles.
Common Queries
What’s the Difference between Legacy Outlook and New Outlook?
New Outlook offers a clean interface, faster performance and modern features like snoozing and unified inbox. Legacy Outlook features not updated and also going to be discontinued in October 2025.
How to Revert Legacy Outlook?
To revert, Click Help in New Outlook then select Revert to New Outlook. Outlook will restart in the older version. Note: this option will be removed before support ends in October 2025, so it’s only temporary.
Should I Switch from Legacy Outlook?
Yes, if you want faster performance and modern features. But if you rely on advanced tools or custom settings, check if they’re available first. Since support ends in 2025 switching now gives you time to adapt.
Conclusion
In this post, we have shared all tested approaches to change Outlook from Legacy to New Outlook for Mac. Switching from Legacy to New Outlook Mac may feel like a big change but it’s crucial as Legacy Outlook will end support in October 2025 upgrading now gives you time to make you comfortable with its features, and also get comfortable with the new version before the old version disappears.