"Is it possible to update my iMac from HDD to SSD?"に関する回答If you are really good, you can fuse the SSD and the HDD to form a Fusion Drive. There are several articles online, one particularly good one by MacWorld. This will combine the SSD and HDD into one logical volume. OS X is smart enough to put the OS and your most frequently used files on the SSD, giving you the speed, and putting the large files on the HDD. This gives you speed without sacrificing size.