Hi everyone! I currently updated my MacBook Pro (Samsung SSD 840 Evo 500GB) to Yosemite coming from Mavericks. Unfortunately, as many of you know, Yosemite doesn´t support Trim anymore unless you really work on the system and might face problems in the future. In my research - thanks google - I found that over provisioning and Garbage Collection from Samsung works pretty well and can be an alternative. I know there is already some Over Provisioning by default on a Samsung SSD, but many more sources suggest improving this part if you dont have Trim. Especially when your SSD is pretty packed. But, Samsung is some how special with the "installation" of over provisioning when you already use the SSD with an OS on it. Does anybody has experience in erasing a SSD and set the partition for the Over Provisioning on a Mac? How did you do it? Any Tutorial I couldnt found? I really don't care about making a clean install again. I just want to make sure the left space is really recognized by the firmware of the SSD. (According to many source, this is the tricky part and solved in Windows with the Magician Software from Samsung.) If you have any suggestions, I would be very pleased. Many thanks for your help in advance!