Installing Office Home and business 2016 to Macos 10.13.6

My old iMac Mid 2011 is stuck at macOS High Sierra (10.13.6) too, but I have MS Office 2019 on it. High Sierra is compatible with MS Office 2019 v16.43.0. Can you log in without any issue to Microsoft account using Safari or Chrome? Safari on HS is way too old now, most websites doesn't work. Also, Chrome doesn't receive updates anymore. I ended using Firefox ESR which works very good for this old macOS version. If the Office app is relying on Safari for the login, that may be the issue.

Daniel-P wrote:

Safari on HS is way too old now, most websites doesn't work. Also, Chrome doesn't receive updates anymore. I ended using Firefox ESR which works very good for this old macOS version. If the Office app is relying on Safari for the login, that may be the issue.

I use a 2011 iMac with Mavericks 10.9 and have got around the browser problems (for now...) by using these :

Chromium Legacy built on Chrome 124 (not being updated further but fine for now):

https://forums.macrumors.com/threads/chromium-legacy-google-chrome-for-os-x-10-7-10-9.2283612/

Firefox Dynasty (constantly being updated with build based on latest Firefox; bear in mind that 115 ESR won't be supported by Mozilla after this month):

https://github.com/i3roly/firefox-dynasty ('Latest' download under 'Releases' lower right)

You’ll need to continue to discuss this with the third parties involved, as AFAIK Microsoft doesn’t sell old keys, and recent Microsoft software won’t install as far back as macOS 10.13.

You would need to specifically find an old version of Microsoft 365 Copilot / 365 / Office for this case, which is what I assume yoi;re trying to download. Current Microsoft 365 Copilot / 365 / Office will not work this far back.

It’s also possible macOS 10.13 is too old and can’t make a secure connection to the Microsoft servers. Maybe a different browser with support that far back?

LibreOffice versions 7.4.x will probably run on macOS 10.13, and is available from the LibreOffice archive:

https://downloadarchive.documentfoundation.org/libreoffice/old/

The hill that is macOS 10.13 will only get steeper as it ages, too.

There have been reports on these forums that Microsoft has taken down activation servers for some older Office products (e.g., Office v.X / Office 2008), so even if you are the original purchaser, and have all original discs and codes, it is impossible to do a "clean" reinstall.

I don't know something similar might be affecting Office 2016 yet.

With their current products, Microsoft has a policy of supporting only the "most recent three" versions of macOS, so while existing customers can keep using old versions of 365/Office on Monterey, it is supposedly impossible to successfully install 365/Office on anything less than Ventura …