Install LibreOffice 5.4.7 . While not "Microsoft Office," it receives better security backports than the dead 14.7.7 update.

: Also compatible with OS X Lion. It is often available as a low-cost legacy option on secondary markets.

If the AutoUpdate tool no longer connects to Microsoft’s servers due to the age of the software, you may need to manually download the 14.7.7 update package from a reputable archive or the official Microsoft Support website if the link is still active. An Alternative Option: Microsoft Office 2008

The only suite that functions reliably on this legacy OS is .

: Office for Mac 2011 is the final version designed for OS X 10.7.

Since it is a legacy product, you cannot buy it directly from the Mac App Store or Microsoft anymore. How can I get Office on my old Mac OS X Version 10.7.5