All about Mac firmware, from PowerPC Open Firmware to Apple silicon’s LLB and iBoot, and what the rules are for updating firmware.
T2
T1 and T2 chips in Intel Macs, integral in M-series chips, used in Sequoia’s virtual machines at last, and an essential feature in Private Cloud Compute.
Two watersheds that could occur in macOS 15: that it only supports Macs with Apple chips including an Arm processor, and that it opens access to older versions of macOS on Apple silicon.
How will quantum cryptography and the ease with which it should break current methods of encryption, affect the security of data on my Mac?
Could old images be retained on a device or your Mac after you had securely erased it using Erase Assistant?
Recent oddities with FileVault Recovery Keys, and a new exploit GoFetch, raise concerns over how secure FileVault protection is.
Simply having a boot volume group with a System snapshot in it won’t get your Mac to start up from that disk, particularly if it’s an Apple silicon model. Some details.
What do you do when your Mac refuses to log you in because it thinks your password is incorrect? Don’t rush or panic, but follow these steps.
No updates for Intel Macs without T2 chips, apart from the iMac19,1, and there only in Sonoma. T2 and Apple silicon models are more confusing, though.
This article lists the firmware versions of Macs that have been successfully upgraded to run macOS 14.8.5 Sonoma. […]
The Eclectic Light Company 