- The delivery and processing is 1A - The Toolbox from the homepage and the firmware update (strongly recommended!) Works of the Transcend website well - The TRIM Support should be necessarily activated, only the system running again quickly with a SSD - I have recently updated from OS X 10.9.3 to 10.9.4. After that, my Macbook was rather slow, although the Toolbox said Trim Support is given. the Mac's System Report was, however: Trim Support NO. I installed TRIM Enabler, since the system is running again 1a. Chameleon SSD Optimizer also would have been suitable. Demand for Transcend: Toolbox has not been updated for 10.9.4, is a known issue :( - Also had problems with the old firmware, if I wanted a second boot partition (my old OS X 10.8 - prohibiting sign appeared in 3 of 4 trials). This could be remedied, have not yet tested it.