Problems entering answers using MAC OS CengageNOW has issued a fix for this problem: 1. Open Finder 2. Go into Macintosh HD 3. Open the Library folder 4. Open Internet Plug-Ins 5. Delete Flash Player.plugin and flashplayer.xpt file 6. Empty your trash can 7. Go to the link below to download and install a previous version of Adobe Flash Player (during installation be sure that you have all browsers closed) ftp://tech:helpme@ftp.thomsonlearning.com/public/Flash/install_flash_player_osx_ub.dmg.zip