Topher, an avid Mac user for the past 15 years, has been a contributing author to MacFixIt since the spring of 2008. One of his passions is troubleshooting Mac problems and making the best use of Macs ...

The images are known as shims, which were invented to extend Secure Boot to Linux devices and utility software. Using a ...

You will agree that an operating system’s primary function is to provide a safe execution environment where different applications can run safely. This necessitates the requirement of a basic ...

Old UEFI shim bootloaders could be abused to bypass Secure Boot on any UEFI-based machine, regardless of the operating system ...

I always get a bit jittery whenever I hear of a new vulnerability that can enable a bypass of the Windows Secure Boot protections. I don’t really need to explain why, do I? Suffice to say, Secure Boot ...

A vulnerability in trusted system recovery programs could allow privileged attackers to inject malware directly into the system startup process in Unified Extensible Firmware Interface (UEFI) devices.

In June 2025, Microsoft announced that, in June 2026, it would begin deprecating Secure Boot certificates of Windows systems from 2011, which were superseded by their 2023 counterparts. As the clock ...

Most PCs should continue working fine, even if they don't receive the updated certificates.

Malware targeting banks, payment card processors, and other financial services has found an effective way to remain largely undetected as it plucks sensitive card data out of computer memory. It ...