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 Do I need to remove the battery before installing JetDrive SSD? Why does Transcend include the Proposition 65 warning? Should I purchase a Jetdrive with larger capacity than the original Mac SSD/HDD if I want to clone the system with Disk Utility? Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started