I notice FileMaker 18 technical requirements (https://www.filemaker.com/products/filemaker-pro-advanced/18-technical-specifications.html) requires a minimum 10 year Windows PC (Windows 7 SP1 Professional Edition) but with only minimum 1.5 year old Mac operating system (macOS Sierra 10.13). Even the RAM requirements are double for the Mac.

This is making it very difficult and wasteful to support Mac installations as perfectly useful Mac computers are incompatible at all or with major OSX upgrades which are not always simply installed.

What is happening here with FileMaker or Claris because this is not a equal playing field.

This likely mirrors long term support from Apple and Microsoft, not a decision from FMI.

Agreed with Mike, this is a reflection on a difference in strategy between MS and Apple when it comes to OS versioning and support for older hardware and OSes.  I very much doubt that Claris can do much about it.