2021年6月14日 · Download current and previous versions of Apple's iOS, iPadOS, watchOS, tvOS, audioOS and macOS firmware and receive notifications when new firmwares are released.

2021年6月16日 · 蘋果又再次針對舊款 iPhone 5s、iPhone 6、iPhone 6 Plus 與 iPad 機型的老用戶釋出最新 iOS 12.5.4 更新，內部版本號為16H50，主要是修正舊版 iOS 12 安全性問題，建議用戶趕緊更新，避免設備容易遭到駭客攻擊，造成設備陷入資安風險。

iOS 12 is the twelfth major release of the iOS mobile operating system developed by Apple. Aesthetically similar to its predecessor, iOS 11, it focuses more on performance than on new features, quality improvements and security updates.

2021年6月14日 · Apple has released iOS 12.5.4 and iPadOS 12.5.4 updates for older iPhone and iPad models, including the iPhone 6, iPhone 5s, iPad Air, more.

2024年9月23日 · Tesla software update 2024.27.25 (FSD 12.5.4) includes ASS (Actually Smart Summon), New Summon Options, FSD (Supervised) v12.5.4, Vision-Based Attention Monitoring, Full Self-Driving (Supervised), LiveOne Powered by Slacker Radio, Automatic Emergency Braking Improvements, YouTube Music, Go on Green, Vision Speed Limits, Amazon Music, Castle ...

适用于 小米11 Pro / Ultra 的 V12.5.4 版本官方刷机包下载，其属稳定版刷机包分类。此次更新内容包括有：相机升级DXOMARK版本，新增关机前定位功能...

适用于 小米MIX4 的 V12.5.4 版本官方刷机包下载，其属稳定版刷机包分类。 此次更新内容包括有：MIUI12.5增强版全面流畅，更低功耗，依据场景的智能算力调度机制，提升全机型流畅度... 备注：刷机有风险，操作需谨慎。 下载均为原版刷机包，无任何修改或添加！ 适用于 小米MIX4 的 V12.5.4 版本官方刷机包下载，其属稳定版刷机包分类。 此次更新内容包括有：MIUI12.5增强版全面流畅，更低功耗，依据场景的智能算力调度机制，提升全机型流畅度...

We have listed all iOS 12.4 - iOS 12.5.7 jailbreak tools with free and latest download links. Choose the best software to jailbreak your iOS 12.5.7 running iPhone, iPad or iPod.

2021年8月1日 · Your iPad model and year may not be able to upgrade/update beyond any version of iOS 12, currently at iOS 12.5.4. The 2013 iPad Air 1, iPad Mini 2 and 2014 iPad Mini 3 cannot upgrade beyond any version of iOS 12. Sorry.

2022年2月1日 · I have an iPhone 6 (model A1586 MG482ZP/A) with iOS 8.3. When I check for updates it says there is a new version iOS 12 but can not download over WiFi and to connect to iTunes. When I connect the phone to iTunes it says there is an 12.5.4 update and press update. When pressed, it asks for a *.ipsw file. The same happens when I press Restore iPhone.