my Mac is version 10.15 but the game doesn't work still like it runs and all but a window does not appear
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Typically Mac issues (on operating system versions prior to 11 like yours) and a result of permissions issues. The two solutions that typically work are to either move the game folder into your "applications" folder and then run it, or assign read/write permissions to the game folder manually, this link should help. https://support.apple.com/en-ca/guide/mac-help/mchlp1203/mac (Be sure to change it to your OS version when you load the page.)
If this doesn't solve the problem let me know and I can see if there's anything else to try.
I've looked into this further, and it looks like unfortunately RPG Maker MV actually stopped working on Mac OS 10.15, not 11 like I previously thought. (There is an official post from RPG Maker that claims 11 is the cut off, but 10.15 is when Mac OS stopped supporting 32 bit programs, which is what I believe the problem is.)
You can most likely run the "Web" version of the game through your browser, though the browser version is not compatible with the plugin that makes your characters appearance change in-game, so you'll be stuck with the default appearance outside of the paperdoll. If you do want to give the web version a try you'll probably need to follow this link to set up your browser to run the game properly. https://www.reddit.com/r/RPGMaker/comments/dqvdqo/fix_error_failed_to_load_dataa...
Sorry about the inconvenience there, I had not realized there were issues with OS 10.15. I've updated the page on that now.