★ Download the iSeven or iSeven Pro theme and unpack the contents of the archive.
★ Mount the ESP of your boot drive.
★ Open EFI>EFI>CLOVER>themes.
★ Copy the unpacked iSeven or iSeven Pro theme and paste in the themes folder.
★ Open the EFI>EFI>CLOVER>config.plist file in an editor.
★ Change the theme name to match iSeven.
★ If this is your primary monitor, set the resolution to then save.
★ Unmount the ESP to protect the contents.
That’s it! When you restart your system, the iSeven theme will load and play the boot sound.