I've read many posts about the performance benefits of SSDs and want to use one with my 2011 iMac (currently with a 1TB internal...not SSD). My plan is to use a LaCie Rugged Thunderbold 250GB SSD ($299). This seems to be enough space for Yosemite plus my main applications (Aperture, iPhoto and Photoshop). I'll keep my data (and other apps) on my existing internal. I also don't have the option to spend more money. I've seen some pretty detailed posts on how others have implemented similar solutions but I still have some basic questions. So, here goes... - I like the idea of creating the boot drive by using TimeMachine...that way my apps are already there. However, since my SSD is only 250 GB, will I have the option to select what I recover from TimeMachine (my current drive uses about 500GB)? If not, what would be the best way to get Yosemite and my apps onto the drive without using TimeMachine? - Can I continue to use my internal 'as is' to read the data and access the other apps? Or, will I need to re-format and remove Yosemite? - I spend most of my time in Aperture and it's frustratingly slow in my current set-up. Will I see a meaningful improvement in performance if the application is on the SSD but the photos remain on the non-SSD? Thank you!