macOS Code Signing

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Code signing is required on macOS to allow your application to be listed in the Apple App Store and to prevent a warning that your application is broken and can not be started, when downloaded from the browser.

Prerequisites

Code signing on macOS requires an Apple Developer account which is either paid (99$ per year) or on the free plan. You also need an Apple device where you perform the code signing. This is required by the signing process and due to Apple’s Terms and Conditions.

Signing

To setup code signing for macOS you must create an Apple code signing certificate and install it to your Mac computer keychain or export it to be used in CI/CD platforms.

Creating a signing certificate

To create a new signing certificate, you must generate a Certificate Signing Request (CSR) file from your Mac computer. See creating a certificate signing request to learn how to create the CSR for code signing.

On your Apple Developer account, navigate to the Certificates, IDs & Profiles page and click on the Create a certificate button to open the interface to create a new certificate. Choose the appropriate certificate type (Apple Distribution to submit apps to the App Store, and Developer ID Application to ship apps outside the App Store). Upload your CSR, and the certificate will be created.

security find-identity -v -p codesigning

This identity can be provided in the tauri.conf.json > bundle > macOS > signingIdentity configuration option or via the APPLE_SIGNING_IDENTITY environment variable.

Signing in CI/CD platforms

To use the certificate in CI/CD platforms, you must export the certificate to a base64 string and configure the APPLE_CERTIFICATE and APPLE_CERTIFICATE_PASSWORD environment variables:

Open the Keychain Access app, click the My Certificates tab in the login keychain and find your certificate’s entry.
Expand the entry, right-click on the key item, and select Export "$KEYNAME".
Select the path to save the certificate’s .p12 file and define a password for the exported certificate.
Convert the .p12 file to base64 running the following script on the terminal:

openssl base64 -in /path/to/certificate.p12 -out certificate-base64.txt

Set the contents of the certificate-base64.txt file to the APPLE_CERTIFICATE environment variable.
Set the certificate password to the APPLE_CERTIFICATE_PASSWORD environment variable.

Example GitHub Actions configuration

Required secrets:

APPLE_ID - Your Apple ID email
APPLE_ID_PASSWORD - Your Apple ID password
APPLE_CERTIFICATE - The base64 encoded .p12 file
APPLE_CERTIFICATE_PASSWORD - The password for your exported .p12 file
KEYCHAIN_PASSWORD - The password for your keychain

name: 'build'

on:
  push:
    branches:
      - main

jobs:
  build-macos:
    needs: prepare
    strategy:
      matrix:
        include:
          - args: '--target aarch64-apple-darwin'
            arch: 'silicon'
          - args: '--target x86_64-apple-darwin'
            arch: 'intel'
    runs-on: macos-latest
    env:
      APPLE_ID: ${{ secrets.APPLE_ID }}
      APPLE_ID_PASSWORD: ${{ secrets.APPLE_ID_PASSWORD }}
    steps:
      - name: Import Apple Developer Certificate
        env:
          APPLE_CERTIFICATE: ${{ secrets.APPLE_CERTIFICATE }}
          APPLE_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
          KEYCHAIN_PASSWORD: ${{ secrets.KEYCHAIN_PASSWORD }}
        run: |
          echo $APPLE_CERTIFICATE | base64 --decode > certificate.p12
          security create-keychain -p "$KEYCHAIN_PASSWORD" build.keychain
          security default-keychain -s build.keychain
          security unlock-keychain -p "$KEYCHAIN_PASSWORD" build.keychain
          security import certificate.p12 -k build.keychain -P "$APPLE_CERTIFICATE_PASSWORD" -T /usr/bin/codesign
          security set-key-partition-list -S apple-tool:,apple:,codesign: -s -k "$KEYCHAIN_PASSWORD" build.keychain
          security find-identity -v -p codesigning build.keychain
      - name: Verify Certificate
        run: |
          CERT_INFO=$(security find-identity -v -p codesigning build.keychain | grep "Apple Development")
          CERT_ID=$(echo "$CERT_INFO" | awk -F'"' '{print $2}')
          echo "CERT_ID=$CERT_ID" >> $GITHUB_ENV
          echo "Certificate imported."
      - uses: tauri-apps/tauri-action@v0
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          APPLE_CERTIFICATE: ${{ secrets.APPLE_CERTIFICATE }}
          APPLE_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
          APPLE_SIGNING_IDENTITY: ${{ env.CERT_ID }}
        with:
          args: ${{ matrix.args }}

Notarization

To notarize your application, you must provide credentials for Tauri to authenticate with Apple:

APPLE_API_ISSUER, APPLE_API_KEY and APPLE_API_KEY_PATH: authenticate using an App Store Connect API key

Open the App Store Connect’s Users and Access page, select the Integrations tab, click on the Add button and select a name and the Developer access. The APPLE_API_ISSUER (Issuer ID) is presented above the keys table, and the APPLE_API_KEY is the value on the Key ID column on that table. You also need to download the private key, which can only be done once and is only visible after a page reload (the button is shown on the table row for the newly created key). The private key file path must be set via the APPLE_API_KEY_PATH environment variable.
APPLE_ID, APPLE_PASSWORD and APPLE_TEAM_ID: authenticate using your Apple ID

Alternatively, to authenticate with your Apple ID, set the APPLE_ID to your Apple account email and the APPLE_PASSWORD to an app-specific password for the Apple account.