If you ignore the update prompt in 2021 or later, the following will happen:
Note: While many users searched for this update around 2021, firmware 4.90 was officially released in early 2023. This guide covers the installation of that firmware. What is New in PS3 Firmware 4.90?
Periodic updates renew the AACS encryption keys required to decrypt and play modern Blu-ray discs. PSN Access: ps3 system software update 490 upd download 2021
: The update reaches a certain percentage (e.g., 37%, 56%, 80%) and then fails, restarts, or soft-bricks the console.
While the user requested a focus on 2021, it is important to clarify that was actually released on February 28, 2023 . The primary update released during the 2021 window was Version 4.88 (June 2021). However, since version 4.90 is the critical milestone many are currently looking for, this guide covers what it does and how to get it. What Does Update 4.90 Actually Do? If you ignore the update prompt in 2021
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If an update is available, it will download and install automatically. Periodic updates renew the AACS encryption keys required
Note: While 4.90 was released in early 2023, the 4.89 update in 2022 and subsequent 4.90/4.91 updates all aimed at similar security and stability goals, including the requirement for device setup passwords for PSN. How to Download and Install PS3 Update 4.90
If your console gives an error before downloading, your internet settings may be stuck on outdated DNS. Try changing your DNS to Google’s (8.8.8.8 and 8.8.4.4).