All Systems > HackBook Systems > Dell Latitude E5440 > Support
Q: I am having problems opening and running programs outside the App Store.
A: You may need to disable Gatekeeper or right-click and open.
Q: What bootloader should I use for the Dell Latitude E5440?
A: We currently recommend and support the Clover Bootloader.
Q: What is the latest Clover EFI that works?
A: We have tested up to Clover EFI 5093 without issues.
Q: What is the oldest Clover EFI that works?
A: We have tested back to Clover EFI 4945 successfully.
Q: I am having problems booting any macOS after a shutdown.
A: This may be a discrete GPU issue.
Q: I am having problems booting any High Sierra after a shutdown.
A: This may be a Apple Security Update. Use Sierra or Mojave temporarily.