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 What should I do if I have difficulties fastening the screws on the JetDrive enclosure? Differences between JetDrive 825 and JetDrive 820. Why can't I wake my JetDrive 850 up from Hibernation Mode? Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started