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 Can I install Win10 for my JDM820/825/850/855 through BootCamp? Do I need to remove the battery before installing JetDrive SSD? How to clean install MacOS on the JetDrive 850 Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started