Been playing with AC15 and OSX Lion on my home systems and am actually (surprisingly!) experiencing few, if any, issues—had to uninstall everything and reinstall to get to this point though! Info Box and Command+T seem to work fine for me. On the plus side, I am loving some of the new Lion features, such as window resizing—don't forget to play with "Shift" and "Option" variations—really nice!
Am making a concerted effort to train myself to use the default "Natural" scrolling feature, was really weird for awhile, but am getting used to it. Better to roll with significant UI changes than resist them, they're not gonna go away and you'll be battling them ad infinitum!—my opinion based on ~30 years 2D/3D CADD experience. Also, like myself, if you use custom Work Environments (WE), I recommend starting with the provided AC15 WE(s) and customizing them rather than bringing "up" customized ones from previous versions. Learned the hard way again, after trying to add an export option to my customized AC14 WE to no avail, but was easily added to the AC15 "Standard Profile 15".
Thomas A Dailey, CPBD, AIBD, Assoc. AIA
www.designdailey.com
ArchiCAD • 25+ years experience
AC …20, Sketchup Pro 2016, Artlantis Studio 6 Piranisi 6 PRO, VectorWorks, Adobe CC, 27" iMacs, G4 Cube, Mac OS 10.12.5, iPad Pro, Windows 7 Ultimate