pkg: document mac arm64 and update package.json scripts

README.md

@@ -48,20 +48,40 @@ Due to Ledger USB integration, additional dependencies are required:
 
 #### OSX
 
+If you are running OSX on an arm64 processor (aka "Apple Silicon" or "M1") it
+is highly recommended to upgrade to Node.js v16
+[which has arm64 support.](https://nodejs.org/en/blog/release/v16.0.0/#toolchain-and-compiler-upgrades)
+
+Building for OSX requires one extra "optional" dependency (dmg-license)
+[that can not currently be installed on Windows/Linux systems](https://github.com/electron-userland/electron-builder/issues/6520):
+
 ```bash
 brew install libusb
 git clone https://github.com/kyokan/bob-wallet
 cd bob-wallet
 npm install
+npm install dmg-license
 ```
 
-Build the app package:
+Build the app package *for the native architecture of your Mac*:
 
 ```bash
-npm run package
+npm run package-mac
 ```
 
-The output app will be created in the `/release/mac` folder. Open `Bob.app` to start the wallet.
+If you are running OSX on an arm64 but want to build the executable for x86 (Intel)
+Macs, you can do so but you must first downgrade to Node.js v14 or re-install Node.js v16
+for x86 instead of arm64. Building for a non-native architecture will seriously impair
+the performance of the application, so this option is only recommended for multi-platform
+distribution by maintainers with M1 Macs. As an extra complication, this process must
+be run in an environment where `libunbound` is available as an x86 package.
+
+```bash
+npm run package-mac-intel
+``` 
+
+The output app will be created in the `/release/mac` or `/release/mac-arm64` folder.
+Open `Bob.app` to start the wallet.
 
 
 #### Linux

package.json

@@ -8,10 +8,10 @@
     "build": "./scripts/package.sh",
     "build-renderer": "NODE_ENV=production webpack --config ./configs/webpack.config.renderer.prod.babel.js",
     "dev": "cross-env START_HOT=1 npm run start-renderer-dev",
-    "package": "npm run build && electron-builder build --publish never",
-    "package-all": "npm run build && electron-builder build -mwl",
     "package-ci": "npm run postinstall && npm run build && electron-builder --publish always",
     "package-linux": "npm run build && electron-builder build --linux --publish never",
+    "package-mac": "npm run build && electron-builder build --mac --publish never",
+    "package-mac-intel": "npm run build && electron-builder build --mac --x64 --publish never",
     "package-win": "node ./scripts/package.js && electron-builder build --win --x64 --arm64=false",
     "prestart": "npm run build",
     "start": "cross-env NODE_ENV=production electron -r @babel/register ./app/main.js",