How do I set up a Digital ID for my signature using my Yubikey security token?

I know this post is old but in case any one is curious.

Here's how to set up a digital ID on a YubiKey and then use it in Adobe Acrobat:
1. Generating or Importing a Digital Certificate:

Before you can use a YubiKey with Adobe Acrobat, you'll need to generate or import a digital certificate. Here's how you can do this using the YubiKey Manager, which is the official YubiKey application for managing your device:

• Download and install YubiKey Manager from Yubico's official website. For macOS (brew install --cask yubico-yubikey-manager)

• Download and install OpenSC open source smart card tools and middleware. For macOS (brew install --cask opensc)

• Launch YubiKey Manager and insert your YubiKey into a USB port.

• Navigate to the "Applications" -> "PIV" -> "Certificates".

• Under the "Digital Signature" section, click "Generate" to create a new certificate. Follow the prompts to complete this process (I used Self-signed certificate but you can use Certificate Signing Request (CSR), it's pricey)

2. Configuring Adobe Acrobat to use the YubiKey:

After you have a certificate on your YubiKey, you can configure Adobe Acrobat to use it:

• Launch Adobe Acrobat and go to "Acrobat" -> "Preferences..." -> "Signatures" -> "Identities & Trusted Certificates" -> "More".

• Click on "PCS#11 Modules and Tokens" under "Digital IDs"

• Click "Attach Module" and paste in the path: /Library/OpenSC/lib/opensc-pkcs11.so

• At this point, Acrobat should detect your YubiKey Digital Signature. (BTW, the default Yubikey PIN is 123456)