I have a MacBook Pro with 2 partitions. One for Apple and one for Windows 7 Pro, 64 bit Bootcamped version. Lightroom is installed and working on Windows partition. Want to migrate Lightroom to Apple partition. I did download Lightroom trial version onto Apple partition thinking I could install product key, but Adobe stopped me as initial copy was installed over 30 days ago. And so, perhaps "sharing" might work??