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NVRAM

Can you change lid behaviour of M1 MacBook Pros?

Fed up with your M1 MBP always starting up, or waking from sleep, when you open its lid? How might you change that behaviour?

February 5, 2022 Macs, Technology

Explainer: Non-Volatile RAM (NVRAM)

How to discover what’s stored in your Mac’s NVRAM, how to reset it in Intel Macs, and how you can changes its variables.

January 22, 2022 Macs, Technology

Last Week on My Mac: Would you regret an M1 iMac?

How ready are M1 Macs now for general use? There are still problems with docks, external boot disks, and using one external boot disk with multiple Macs.

May 9, 2021 Macs, Technology

System management and NVRAM on M1 Macs

There’s no SMC, so you can’t reset it. Although there’s still NVRAM (PRAM), that can’t be reset either: full details of both for M1 models.

January 21, 2021 Macs, Technology

How to enable the startup chime on recent Macs

One feature that many users miss on more recent Mac models is the startup chime. Although once a […]

February 22, 2020 Macs, Technology

Reset and maintain your SMC and NVRAM

How to reset them, and what they do. Includes coverage of the SMC functions in T2 chips, and how to reset them too.

November 18, 2019 Macs, Technology

Which startup mode?

Diagnostic, Recovery, Safe, Startup Manager, Verbose, reset SMC/NVRAM, firmware restore, Target Disk/Display, Single-User (SUM) in outline.

November 16, 2019 Macs, Technology

What’s stored in NVRAM?

Listing of known NVRAM variables and their usage/meaning, together with notes on how to change them.

August 24, 2018 Macs, Technology

Apple changes SMC reset on T2 Macs, and updates NVRAM reset info

Important info about resetting the NVRAM with a firmware password, and new procedures for resetting the SMC in Macs with T2 chips.

August 22, 2018 Macs, Technology

Firmware, the SMC, NVRAM and T2 chip: reset and maintain

All about firmware, the SMC, NVRAM, and the new T2 chips which come in some models of Mac. When and how to reset, and more.

July 17, 2018 Macs, Technology

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