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 Is there any way that I can clone my Mac OS to JetDrive SSD? Why is the performance of my JDM820/825 lower than specified? Why can't I boot from my JetDrive SSD after system migration? Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started