
Keep Your Connection Secure Without a Monthly Bill. Until then, enjoy your new dark boot screen, and let us know what you think of it in the comment section below. I will also be sure to update this guide with the newest version of the script to avoid incompatibility issues. It is possible that a future update to Yosemite will revert you back to the normal boot screen, but as of right now, it is compatible on 10.10 and 10.10.1 versions.


copy the original backup to /System/Library/CoreServices/boot.efi.sudo chflags nouchg /System/Library/CoreServices/boot.efi.Find your original file, place it on your desktop, then rename it to "boot.efi" (without quotes) and run the following five commands in Terminal:

The script made a backup of your original boot.efi file before tweaking it and placed it in /System/Library/CoreServices/efi_backups/. Note that this will not work with devices running anything other than Yosemite, so if you ever downgrade back to Mavericks, you will need to revert back to the original boot screen. Image via w0lfschild Step 5: Going Back to Normal (Optional)
