The latest version of the eID software is always available on their website.
If your eID software does not offer an automatic update, then:
Run ID-card utility and click on ’Settings', then 'Check for updates and close utility’
If there is a new version available you can follow the onscreen instructions.
Mac OS X
If you have DigiDoc4 client (includes DigiDoc4 crypto) and ID-card utility installed then Apple's AppStore will keep your software up to date
If you're using your eID card with browsers in order to enter and/or sign digitally in
e-services then you'll also have to keep the web components up to date
If there's a new version available, the software will notify you, but from time to time you should check for updates manually as well
In order to do that: type "id-updater" into Spotlight search (top right corner) and press Enter, wait until ID-updater launches and if you see the button 'Download update' at the bottom left corner becoming active, click it and follow onscreen instructions
You can also check the ID.ee website for more details.