Thanks a lot Fulvio : 1) Remove line in tclgame.tcl -> don't correct the problem 2) run Scid from Scid_macos_static_x64 correct this problem AND also correct my left click in pgn viewer (Mail : [Scid-users] V4.71 on macOS BigSur / mouse issues https://sourceforge.net/p/scid/mailman/message/37272854/) So, I will try to download / compile with TCL/TK 8.6.10 Pat Le 5 mai 2021 à 13:23, Fulvio fulvioscid@users.sourceforge.net a écrit : You can try to: - remove line 289 in tcl/game.tcl (tk::PlaceWindow...