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 How are SLC (Single-Level Cell), MLC (Multi-Level Cell) and TLC (Triple-Level Cell) Flash different from one another? My newly installed JetDrive cannot be detected in Mac's Disk Utility. Why won't Apple's original 1TB SSD fit in my JDM 855/825 enclosure? Technische support If the answer can't help you, you can contact the Tech Support Department Starten