diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e87a580..066a5d0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,10 +15,11 @@ env:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
+        os: ["ubuntu-latest", "macos-latest"]
         python-version: ["3.5","3.6","3.7","3.8","3.9","3.10","3.11"]
 
     steps:
diff --git a/.github/workflows/build_ubuntu-20.04.yml b/.github/workflows/build_ubuntu-20.04.yml
deleted file mode 100644
index ab53777..0000000
--- a/.github/workflows/build_ubuntu-20.04.yml
+++ /dev/null
@@ -1,105 +0,0 @@
-# This workflow will install RGI dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
-
-name: Build RGI and test
-
-on:
-  push:
-    branches: [ 'master' ]
-  pull_request:
-    branches: [ 'master' ]
-  workflow_dispatch:
-
-env:
-  BLAST_VERSION: 2.14.1
-
-jobs:
-  build:
-    runs-on: ubuntu-20.04
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.5","3.6","3.7","3.8","3.9","3.10","3.11"]
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
-      with:
-        python-version: ${{ matrix.python-version }}
-        architecture: 'x64'
-    - name: Install dependencies
-      run: |
-
-        sudo apt-get -qq update
-        sudo apt-get -qq install -y prodigal tree
-        sudo apt-get -qq install -y libtbb-dev
-        sudo apt-get -qq install -y cmake g++ make
-
-        echo "install blast ..."
-        wget --quiet http://ftp.ncbi.nlm.nih.gov/blast/executables/blast+/${BLAST_VERSION}/ncbi-blast-${BLAST_VERSION}+-x64-linux.tar.gz
-        tar xzf ncbi-blast-${BLAST_VERSION}+-x64-linux.tar.gz
-        sudo mv ncbi-blast-${BLAST_VERSION}+/bin/* /usr/bin
-
-        wget --quiet https://github.com/BenLangmead/bowtie2/releases/download/v2.4.5/bowtie2-2.4.5-linux-x86_64.zip
-        unzip -q bowtie2-2.4.5-linux-x86_64.zip
-        sudo mv bowtie2-2.4.5-linux-x86_64/bowtie2* /usr/bin
-
-        wget --quiet http://github.com/bbuchfink/diamond/releases/download/v0.8.36/diamond-linux64.tar.gz
-        tar xzf diamond-linux64.tar.gz
-        sudo mv diamond /usr/bin
-
-        git clone --quiet https://github.com/lh3/bwa.git
-        pushd bwa && make --quiet && sudo mv bwa /usr/bin && popd
-
-        wget --quiet https://github.com/gmarcais/Jellyfish/releases/download/v2.2.10/jellyfish-linux
-        mv jellyfish-linux jellyfish && chmod +x jellyfish && sudo mv jellyfish /usr/bin
-
-        wget --quiet https://github.com/samtools/samtools/releases/download/1.9/samtools-1.9.tar.bz2
-        tar jxf samtools-1.9.tar.bz2
-        pushd samtools-1.9 && ./configure --enable-silent-rules && make --quiet && sudo mv samtools /usr/bin && popd
-
-        wget --quiet https://github.com/pezmaster31/bamtools/archive/v2.5.2.tar.gz
-        tar xzf v2.5.2.tar.gz
-        pushd bamtools-2.5.2/ && mkdir build && cd build && cmake .. && make --quiet && sudo make install --quiet && popd
-        bamtools --version
-
-        wget --quiet https://github.com/arq5x/bedtools2/releases/download/v2.28.0/bedtools
-        chmod +x bedtools && sudo mv bedtools /usr/bin
-
-        git clone --quiet https://bitbucket.org/genomicepidemiology/kma.git
-        pushd kma && make --quiet && sudo mv kma /usr/bin && popd
-
-        python -m pip install --upgrade --quiet pip
-        #python -m pip install --quiet flake8 pytest
-        python -m pip install --quiet pytest
-        python -m pip install --quiet setuptools
-
-    - name: Install rgi
-      run: |
-        echo "=====> install rgi ..."
-        echo `pwd`
-        pip3 install -r requirements.txt
-        pip3 install setuptools
-        pip3 install .
-    - name: Check versions
-      run: |
-          echo "=====> check versions installed ..."
-          echo `pwd`
-          blastp -version
-          bowtie2 --version
-          diamond --version
-          jellyfish --version
-          samtools --version
-          bedtools --version
-          kma -v
-          rgi -h
-    # - name: Lint with flake8
-    #   run: |
-    #     # stop the build if there are Python syntax errors or undefined names
-    #     flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-    #     # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-    #     flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-    - name: Test with pytest
-      run: |
-        bash test.sh