Error with gm/convert binaries

[axul]

Platform: macOS sierra
What I did:

1. npm install -g cordova-icon-gm
   Log:
   Checking Project & Icon

✓ platforms found: ios, android
✓ icon.png exists
✓ config.xml exists

Generating Icons for ios

Error: Could not execute GraphicsMagick/ImageMagick: gm "convert" "icon.png" "-resize" "40x40" "platforms/ios/Programa experto en interpretación de espirometrías/Resources/icons/icon-40.png" this most likely means the gm/convert binaries can't be found
at ChildProcess. (/Users/axul/.nvm/versions/node/v7.1.0/lib/node_modules/cordova-icon-gm/node_modules/gm/lib/command.js:232:12)
at emitOne (events.js:96:13)
at ChildProcess.emit (events.js:188:7)
at Process.ChildProcess._handle.onexit (internal/child_process.js:213:12)
at onErrorNT (internal/child_process.js:359:16)
at _combinedTickCallback (internal/process/next_tick.js:74:11)
at process._tickCallback (internal/process/next_tick.js:98:9)

Then i tried:

1. npm install -g gm
2. npm install -g cordova-icon-gm

Same result

[glennra]

You need to install GraphicsMagick separately. You can use Brew or MacPorts for this.