I hate parallel's business model. I bought Parallels version 10 in a box with a free upgrade to 11. It sat in the box for about a month after I got it and to my horror I found out the offer expired literally 1 day before I tried to redeem it. I contacted their support but they flatly refused to give me the free upgrade. I bought Fusion and I'll never give Parallel's another dime, this I vow.