Hello, Good news again: After applying th following patch (which was provided by Graeme Gill): <http://www.argyllcms.com/disptools_win64.zip> (Installation: just copy the included exe-files in the Argyllcms-bin-Folder and overwrite the old files) I now get: Gamut coverage: 99,6 % sRGB, 93,4% Adobe RGB Gamut Volume: 152,3 % sRGB, 105% Adobe RGB -> The Patch for Win 7 64 Bit is working! I now get a profile with wide gamut as expected! Now everything is working fine for my hardware under Mac OSX 10.8 and Win 64 Bit (I am using a Radeon HD 6870 Grafics-Card, a Dell 2711 Wide Gamut Monitor in Mode Standard or Custom and a Colormunki Dislay). THANK YOU very much Graeme Gill for your support and this great software! Alex