An option to use once you know how to get the € symbol is to create a text shortcut for the symbol on your Mac for faster typing. You can do this using text replacement.
To get started, follow these steps (also see image below for reference):
- Launch System Preferences and click on Keyboard (Language & Text on previous versions of OS X).
- Click on the Text tab.
- The Replace and With columns appear. Click on the + button at bottom-left to add a new text shortcut, which opens a text field for you to type your trigger text, for example
- Press ⇥ tab key or mouse over to the adjacent text field (under the With column) and enter the actual € symbol. This becomes the resulting replacement text.
And you’re done. The next time you enter “euro” it will be replaced automatically with “€”. But you can always press the Esc keyboard button (to cancel the text replacement) if you actually want to type out the word “euro”.
This also works for iOS devices under Settings → General → Keyboard → Shortcuts.
Please note that this does not work automatically in every app. I’ve confirmed it works on iMessage, Notes, Reminders, Mail.
For iWork (e.g., Pages, Keynotes, Numbers) you’ll have to add the shortcuts as they use their own text replacement functionality. For example in Pages, click on the Pages menu item, then click on Auto-Correction tab, and add any text shortcuts in the same way as above. Here you can even choose to toggle (on or off) which text shortcuts you want to be active.