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I have the same issue.  M1 Mac MacOS Sequoia 15.2.  Bought from Costco and trying to install.  Entered my Intuit credentials and my Mac password when it asked for that...don't remember the order.  Does the check for updates...and won't go past the white screen with Cancel.  I can see the menu, but can't find anything there where I might try to put activation code that it never asked for.  Really need to get it installed to calculate my estimated payment for the 15th!  Hopefully someone can help!