Mac OS 10.12.6 is good enough to run Office 2019 build 16.29.1, which is the build that came out just prior to the release of Mac OS 10.13 Catalina. I'm not quite sure what version you have at the moment. If it is not 16.29.1 then do the following: Uninstall Office for Mac - Office Support. Then, download and install the 16.29.1 build of Office. If your macOS version is not 10.12 or later, we suggest you upgrade your macOS version from Mac App store to access new Office 365 for Mac features. If your macOS version already is the highest version you can update you may need to seek help from Apple Support to confirm whether your device can support the latest MacOS version. @ keg55; on attempt of trying a 'Direct' installation to Mojave the mac responses that I need to have High Sierra vers. 10.13.6 already installed. I cannot INSTALL the 10.13.1 vers I have!! Also this: To install macOS High Sierra, a firmware update is required. The download that you can expect will give you a full download for macOS 10.13.2 - the current version. The ONLY way to revert to 10.13.0 is to find that original release version somewhere. The recovery system does not do that.
It's quite possible your computer is too old to upgrade past Lion, but if you can then El Capitan will probably be your limit.
Mac Os 10.13.0 Update Download
Upgrading to El Capitan
You can upgrade to El Capitan from Lion or directly from Snow Leopard. El Capitan can be downloaded from the Mac App Store for FREE.
To upgrade to El Capitan you must have Snow Leopard 10.6.8 or Lion installed. Download El Capitan from the App Store. Sign in using your Apple ID. El Capitan is free. The file is quite large, over 5 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
Macs that can be upgraded to OS X El Capitan
1. iMac (Mid 2007 or newer) - Model Identifier 7,1 or later
2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) - Model Identifier 5,1 or later
3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later
4. MacBook Air (Late 2008 or newer) - Model Identifier 2,1 or later
5. Mac mini (Early 2009 or newer) - Model Identifier 3,1 or later
6. Mac Pro (Early 2008 or newer) - Model Identifier 3,1 or later
7. Xserve (Early 2009) - Model Identifier 3,1 or later
To find the model identifier open System Profiler in the Utilities' folder. It's displayed in the panel on the right.
Are my applications compatible? See App Compatibility Table - RoaringApps.
Macos Version 10.13.0 Update
Upgrading to Lion
If your computer does not meet the requirements to install El Capitan, it may still meet the requirements to install Lion.
You can purchase Lion at the Online Apple Store. The cost is $19.99 (as it was before) plus tax. It's a download. You will get an email containing a redemption code that you then use at the Mac App Store to download Lion. Save a copy of that installer to your Downloads folder because the installer deletes itself at the end of the installation.
Lion System Requirements
1. Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7,
or Xeon processor
2. 2GB of memory
3. OS X v10.6.6 or later (v10.6.8 recommended)
4. 7GB of available space
5. Some features require an Apple ID; terms apply.
Nov 25, 2017 8:40 PM