There are other issues with Parallels and interfacing with my MacBook Pro with Retina Display that I am working around due to lack of time to call in, however, I'm completely flummoxed and need help quickly on why the worksheet tabs on the bottom of my Excel workbook disappear. I can eventually conjure them up, but I'm running out of sacrificial goats. I suspect the problem is related to retina as well, but ,<sigh> I hope there's a workaround at least. Brand spanking new MacBook Pro and Maverick OS. Office Pro 2010. Anyone?