Numbers for Mac
I have a numbers file that won't open. When I try to open the file a message drops and says "To open this version you'll need the latest version of numbers". So, I went to the App store to download the latest version of numbers. But the message then says "Numbers can't be installed on Macintosh HD because MacOS version 10.14 or later is required. I currently have macOS High Sierra Version 10.13.6 What do I need to do?