I frequently find myself googling "micro sign" when I need to type the micro sign μ.

Is there an easier way? How can I type this sign using my keyboard?

I am on macOS Monterey using the ABC Extended keyboard (in English).

  • 2
    Is there any particular reason you're using ABC Extended rather than any 'normal' English? [If it's because you need specific characters, let us know which characters & maybe we can find them on a 'regular' English too] µ is Opt/m on most English layouts, but isn't available at all on ABC.
    – Tetsujin
    Dec 19, 2021 at 10:49
  • Pic of ABC with Opt pressed - i.sstatic.net/FTeej.png Pic of British English with Opt pressed - i.sstatic.net/pVp0r.png
    – Tetsujin
    Dec 19, 2021 at 11:39
  • @Tetsujin I've deleted my comment, as it seemed to work briefly when on ABC Extended, but then I deleted ABC Extended from my input sources and re-added it, and no longer works... However ABC (not extended) does support Opt/m combination
    – AVelj
    Dec 19, 2021 at 11:40
  • Yes, ABC is almost a simple 'international' English [British with swaps for pound, cents & Euro to be more like US English]. Extended gets happy with dead keys. They're not really similar. [I ought to have made that distinction at the end of my first comment, but too late now]
    – Tetsujin
    Dec 19, 2021 at 11:44
  • 1
    @Tetsujin no, I think that's what the OS came with when I bought my MacBook. I'll switch to normal English. Dec 19, 2021 at 13:45

1 Answer 1


Pressing ⌥ OptionM when using the ABC keyboard layout (which is equivalent to the US keyboard layout) should print µ.

Additional info

You can also use the Unicode Hex Input keyboard layout1 and type O3BC (which is the hex code for µ) while holding the ⌥ Option key to write µ.

Note: You can also type 00B5 while holding ⌥ Option to write µ (see Character encodings - Wikipedia).

1Basically, the Unicode Hex Input keyboard layout allows you to enter any character by typing its hex code while holding the ⌥ Option key. It could be added in System Settings > Keyboard > Text Inputs (on Ventura).


Not the answer you're looking for? Browse other questions tagged .