Office Mac 2019

Question

Office Mac 2019

u n 0

Dear Support Team,

I have two Microsoft 2019 Mac Home business licenses that were legally purchased and are linked to my Microsoft account. However, I can no longer use them.

The installer file Microsoft_365_and_Office_16.78.23102801_BusinessPro_Installer.pkg is no longer available. As a result, after installing Office, I am unable to connect the installation to my Microsoft account and activate my existing licenses.

Please provide the required installer file or an alternative solution that will allow me to use the licenses I have already purchased.

I do not intend to purchase any additional software, as I already own valid licenses and simply need a way to reinstall and activate them.

Thank you for your assistance. I look forward to your prompt response.

Kind regards,

Move from Microsoft 365 and Office | Word | For business | MacOS

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3 answers

Your answer

Answer 1

u n 0

Hi

Thanks for Answer. **I can't believe the licenses I was using just a couple of days ago are no longer valid.**I attempted to follow the instructions, and here's what happened.

No license found

No license was found for Purchase Microsoft 365 for this account, or use a different account to activate Microsoft 365 if you have already purchased it.

Buy Microsoft 365

Use another account

Need a plan for your business? View business plans

0 comments

Answer 2

John Korchok 234.6K Volunteer Moderator

Unfortunately, the 2019 software is not installable on versions of macOS from Ventura on. You can only install Office 2021 or Office 2024 under the 4 most recent versions of macOS. You'll have to buy a new version of Office 2024 with Outlook or without Outlook, or subscribe to Microsoft 365 to get Office on your computer. You can use Word for the web for free, though it is less capable than the desktop software.

Previously, I would have mentioned that 2019 could be installed under Monterey or earlier, but Microsoft has declined to renew a key certificate, so Office 2019 is now View Only on older Mac operating systems.

u n 0 Reputation points

2026-07-14T18:37:54.26+00:00

Thank you for your reply.

However, I don't understand your response. Until two days ago, I was using Office 2019 for Mac on my Mac with an M3 chip without any issues. The applications were working normally.

For this reason, I don't understand why you are saying that Office 2019 is not installable or supported on macOS Ventura or later.
u n 0 Reputation points

2026-07-14T18:58:06.68+00:00

Thank you for your reply.

However, I don't understand your response. Until two days ago, I was using Office 2019 for Mac on my Mac with an M3 chip without any issues. The applications were working normally.

For this reason, I don't understand why you are saying that Office 2019 is not installable or supported on macOS Ventura or later.
u n 0 Reputation points

2026-07-15T11:52:21.12+00:00

Hi John,

Thank you for your reply.

As I mentioned before, until just a few days ago we were using our Office 2019 licenses on our Macs without any issues. Our Macs are the same as before, and they are all running Tahoe.

If the situation is as you described, what has changed over the last three days?

Answer 3

Kai-H 21,805 Microsoft External Staff Moderator

Hi, u n

Your licenses have not disappeared. The problem is usually that the current Office installer installs a newer build that does not accept Office 2019 licensing. Version 16.78 was the final build supporting Office 2019 for Mac.

Here are some suggestions you can try:

Remove the currently installed Office apps from Finder > Applications. Do not reinstall them from the Mac App Store, because App Store versions cannot use Office 2019 one-time licenses.

Download the official Office 2019 for Mac installer directly from Microsoft. The package name does not need to match the old 16.78.23102801 filename exactly.

Install it, open Word, select Sign in, and use the Microsoft account showing both licenses under Services & subscriptions. If asked, choose an unused Office 2019 license from the list.

If activation still fails, run the official License Removal Tool, restart the Mac, then sign in again.

Office 2019 is no longer supported or receiving security updates, but the existing license can still be used.

Thank you for your patience in reading, I hope this information has been helpful to you.

If the answer is helpful, please click "Yes" and kindly upvote it. If you have extra questions about this answer, please click "Comment."

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

u n 0 Reputation points

2026-07-14T19:02:42.1966667+00:00

hank you for your reply.

The problem is that if I download Office from my Microsoft account, it installs the latest Microsoft 365 version instead of Office 2019. Because of that, I can't activate or use my Office 2019 license. Could you please advise how I can download the Office 2019 installer instead?
Kai-H 21,805 Reputation points Microsoft External Staff Moderator

2026-07-15T06:23:22.98+00:00

Hi, u n

You can click the highlighted link that I attached in my answer above. It's the direct installer for Mac that you can download and install.
u n 0 Reputation points

2026-07-15T11:19:50.3633333+00:00

Hi

Thanks for Answer. **I can't believe the licenses I was using just a couple of days ago are no longer valid.**I attempted to follow the instructions, and here's what happened.

No license found

No license was found for Purchase Microsoft 365 for this account, or use a different account to activate Microsoft 365 if you have already purchased it.

Buy Microsoft 365

Use another account

Need a plan for your business? View business plans
Kai-H 21,805 Reputation points Microsoft External Staff Moderator

2026-07-16T06:19:50.4033333+00:00

Hi, u n

That message does not mean the licenses were deleted from the account. A new licensing-certificate issue began on July 13, 2026, affecting Office 2019 for Mac. Because Office 2019 cannot receive the required certificate update, reinstalling version 16.78 or clearing the license files will not restore activation. I’m sorry, my earlier instructions did not account for this new change.

Here are the practical options now:

Check the email address linked to the Office purchase, including its Spam or Junk folder. Eligible Office 2019 customers were sent an offer for a three-month Microsoft 365 Personal code, redeemable by September 13, 2026.

Use Word, Excel, and PowerPoint through Microsoft 365 on the web with the same Microsoft account. The browser versions can be used without purchasing another desktop license.

Contact Microsoft Support, provide the purchase receipts, and specifically mention the July 13, 2026 Office for Mac licensing-certificate expiration. Ask them to check whether the promotional code was issued to the account.

Please be advised that this is a user-to-user support forum. Moderators and contributors, including external Microsoft employees, are not allowed to directly interfere with Microsoft product features or access back-end systems. Our role is limited solely to providing technical guidance on reported incidents, requests, or ideas.

Unfortunately, there is no replacement Office 2019 installer that bypasses this certificate issue.