Download iOS 15.5 (19F77) for iPhone 12 Pro Max

You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.

❌ This IPSW firmware is not being Signed by Apple

Firmware Identifier iPhone13,4
iOS Version 15.5
Release Date 2022-05-16
Update Date 2022-05-11
Sha1sum
ec3f54ca2d30738e71853f99943596e73d104969
Sha256sum
a599cd0d20eebb6bb1f404f4e5234f5a26adf794cff7a37207b87fe85f5b627a
md5sum
cf4922b0fe778fbe96cdf9a4ab7a1d98
Size 6.10 GB
FileName
iPhone13,4_15.5_19F77_Restore.ipsw
Status

Download IPSW (6.10GB) Check device info
Release Notes

It should be noted that these are the official release notes for the from Apple

iOS 15.5 includes the following improvements and bug fixes:

Some features may not be available for all regions or on all Apple devices. For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222