Why does my Mac computer take longer to boot after I upgraded it with JetDrive SSD? Category : Setup / Operation After upgrading your Mac with JetDrive SSD, please reset the "Start up Disk" by the following steps:1. Find "System Preferences"2. Click "Start up Disk"3. Unlock and set the disk you would like to use as start up disk 4. Reboot Is the answer helpful? Related I want to clone the OS to JetDrive on OS X Yosemite (10.10). Why can't I see "Recovery" partition when I press "Option" button at startup? My computer won’t recognize the JDM855/850. Why is the performance of my JDM820/825 lower than specified? Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started