Apps not opening with macOS Big Sur.
Since update of macOS Big Sur, Solitaire and Freecell games won't open. ????
MacBook Pro 15″, macOS 11.0
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Most likely because they are older 32-bit games and macOS Big Sur, like Catalina, only supports 64-bit applications. Contact the game developer(s), and see if they now have compatible 64-bit versions of these games.