I'd like to create a couple of bootable USB drives for Mavericks and Yosemite, as I'll soon have a new laptop (and I'm not 100% sure what OS it has on it, it's an older Macbook Pro unit) and I want to have backups if needed. However, my current computer only goes up to Lion and it will not let me download Mavericks or Yosemite from the App Store (even though I'm pretty sure it at least let me try before) I was told that I don't even need to do this and can just do Internet Recovery but I'd like to have these available if needed. My questions are two-fold: I have 2 8gb 3.0 USB drives and I'd like to use both if I can. If I cannot download from the App Store, is there another way to get both Mavericks and Yosemite? (Also, 8gb is enough, correct?) If I can answer any other questions or supply additional information, please do let me know. I'd love to get these worked out so that I can eventually start to work with my new laptop.