diff --git a/lib/docker-sync/dependencies.rb b/lib/docker-sync/dependencies.rb
index 7d99bb9b..c2b21348 100644
--- a/lib/docker-sync/dependencies.rb
+++ b/lib/docker-sync/dependencies.rb
@@ -27,7 +27,7 @@ def self.ensure_all_for_mac!(config)
         unless Fswatch.available?
           Fswatch.ensure!
           puts "please restart docker sync so the installation of fswatch takes effect"
-          exit 1
+          raise(UNSUPPORTED_OPERATING_SYSTEM)
         end
       end
 
diff --git a/lib/docker-sync/watch_strategy/fswatch.rb b/lib/docker-sync/watch_strategy/fswatch.rb
index ad156916..63770cf1 100644
--- a/lib/docker-sync/watch_strategy/fswatch.rb
+++ b/lib/docker-sync/watch_strategy/fswatch.rb
@@ -25,7 +25,7 @@ def initialize(sync_name, options)
               exit 1
             end
             puts "please restart docker sync so the installation of fswatch takes effect"
-            exit 1
+            raise(UNSUPPORTED_OPERATING_SYSTEM)
           end
 
       end
diff --git a/spec/integration/native-osx_strategy_spec.rb b/spec/integration/native-osx_strategy_spec.rb
index f689aa51..c84ee4da 100644
--- a/spec/integration/native-osx_strategy_spec.rb
+++ b/spec/integration/native-osx_strategy_spec.rb
@@ -1,6 +1,7 @@
 require 'spec_helper'
 require 'fileutils'
 require 'os'
+require 'rspec/bash'
 
 RSpec.describe 'native_osx strategy', command_execution: :allowed, if: OS.mac? do
   include Rspec::Bash
diff --git a/spec/integration/version_spec.rb b/spec/integration/version_spec.rb
index d0b4410d..7cccd6bc 100644
--- a/spec/integration/version_spec.rb
+++ b/spec/integration/version_spec.rb
@@ -1,5 +1,7 @@
 require 'spec_helper'
 require 'docker-sync/upgrade_check'
+require 'rspec/bash'
+
 RSpec.describe '--version', command_execution: :allowed do
   include Rspec::Bash
 
diff --git a/spec/lib/docker-sync/dependencies_spec.rb b/spec/lib/docker-sync/dependencies_spec.rb
index 5ebba98c..259ef5f5 100644
--- a/spec/lib/docker-sync/dependencies_spec.rb
+++ b/spec/lib/docker-sync/dependencies_spec.rb
@@ -57,6 +57,7 @@
   describe '.ensure_all_for_mac!(config)' do
     before do
       allow(described_class::PackageManager).to receive(:ensure!)
+      #allow(DockerSync::Dependencies::Fswatch).to receive(:ensure!).and_return(true)
       allow(described_class::Docker).to receive(:ensure!)
     end
 
diff --git a/spec/lib/docker-sync/project_config_spec.rb b/spec/lib/docker-sync/project_config_spec.rb
index 26cfb152..5c9542cd 100644
--- a/spec/lib/docker-sync/project_config_spec.rb
+++ b/spec/lib/docker-sync/project_config_spec.rb
@@ -6,8 +6,12 @@
   let(:default_watch_strategy) { OS.linux? ? 'dummy' : 'unison' }
 
   subject { described_class.new }
+  before do
+    allow(DockerSync::Dependencies::Docker::Driver).to receive(:system).with('pgrep -q com.docker.hyperkit').and_return(true)
+  end
 
   describe '#initialize' do
+
     describe 'minimum configuration with defaults' do
       it 'loads simplest config' do
         use_fixture 'simplest' do