If you are running an A7–A11 device on iOS 12.5.5 or earlier, Chimera 1.6.5 remains a viable option—just be aware that it will never support newer iOS releases. If you have already updated to a patched version, your path forward is either to embrace stock iOS or switch to a hardware-based jailbreak like Checkra1n.
For security researchers, the patch applied to iOS 12.5.6+ is a textbook example of responsible disclosure and timely mitigation. The vulnerabilities in Chimera 1.6.5 have been cataloged, fixed, and documented—making the operating system safer for the majority of users. chimera 165 patched
Always backup your device before attempting any jailbreak or system modification. The information in this article is for educational and archival purposes only. If you are running an A7–A11 device on iOS 12