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 is the system optimization function displayed as OFF the second time I activate JetDrive Toolbox when the function was turned ON previously? When I run the Apple Hardware Test (AHT) before installing OS on the JetDrive, I get an error message saying “4HDD/ 11/ 40000000: SATA(0,0)”. How can I solve this problem? Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started