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't access the BootCamp control panel on my Windows System. Why is the performance of my JDM820/825 lower than specified? Why do I get a blue screen with an error message, "STOP 0x0000007B INACCESSABLE_BOOT_DEVICE," when installing Windows 7/8/10 OS using the SSD? Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started