Thanks I thought that the os should be defined as matrix but this not case

S

name: PharoVersion

	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	on:
	push:
	branches:
	- master

	jobs:
	build:
	runs-on: [ ubuntu-latest, mac-latest ]
	strategy:
	matrix:
	smalltalk: [ Pharo64-8.0, Pharo64-9.0 ]
	name: ${{ matrix.smalltalk }}

	steps:
	- uses: actions/checkout@v2
	- uses: hpi-swa/setup-smalltalkCI@v1
	with:
	smalltalk-version: ${{ matrix.smalltalk }}
	- name: Load Image and Run Tests
	run: smalltalkci -s ${{ matrix.smalltalk }}
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	timeout-minutes: 15