The AppleLogo is located at
/Firmware/all_flash/all_flash.(MODEL-NAME).production/(APPLELOGO-IMG3-FILE-NAME).img3 in the IPSW, the Apple logo is flashed to NOR (or a functionally equivalent partition) and displayed at boot time.
If the boot-arg
-v was enabled, it will eventually appear over it.
It is a PNG picture with an alpha channel packed into an IMG3 archive.
Due to limited firmware storage space, any custom boot logo must be exactly 320x4801 and under 100 kB.
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