How Can We Know If Old App Store Apps Still Work With New Versions Of macOS?

Sunday November 11, 2018. 04:24 PM , from MacMost

I have many old apps purchased from the App store that I wonder if they will still work with the newest versions of OS
Is there a reliable list or source that I can validate these and how can I find it.
I have a 2 year old I-Mac using the latest version of OS.
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Walt Ryan

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