diff --git a/OATFWGUI/gui_logic.py b/OATFWGUI/gui_logic.py
index aa8ec89..445e302 100644
--- a/OATFWGUI/gui_logic.py
+++ b/OATFWGUI/gui_logic.py
@@ -368,7 +368,8 @@ def upload_fw(self):
     @Slot()
     def pio_upload_finished(self):
         log.info(f'platformio upload finished')
-        self.avr_dude_logwatch.stop()
+        if self.logic_state.env_is_avr_based():
+            self.avr_dude_logwatch.stop()
         exit_code = external_processes['platformio'].qproc.exitCode()
         if exit_code == 0:
             log.info('Normal exit')
diff --git a/OATFWGUI/log_utils.py b/OATFWGUI/log_utils.py
index 0a19b48..c112927 100644
--- a/OATFWGUI/log_utils.py
+++ b/OATFWGUI/log_utils.py
@@ -123,6 +123,9 @@ def file_changed(self, _path: str):
                 self.log.info(line)
 
     def stop(self):
+        if self.tempfile is None:
+            self.log.warning('Can\'t stop watching None file?')
+            return
         self.log.debug(f'Cleaning up logged external file {self.tempfile.name}')
         self.tempfile.close()
         self.file_watcher.removePath(self.tempfile.name)
diff --git a/README.md b/README.md
index 5278c41..b0de04b 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ OpenAstroTech FirmWare Graphical User Interface -- A graphical way to build and
 - Linux 64 bit
   - Requires Python 3.7..3.11, git, libc >= 2.28 (check with `ldd --version`)
 
-MacOS _might_ work, don't have a mac to test on. Drop a line if you're willing to test it!
+MacOS support [is in progress](https://github.com/OpenAstroTech/OATFWGUI/commits/feature/js/official-mac-support/), but isn't reliable yet.
 
 ## Installing
 Simply download the [latest release](https://github.com/OpenAstroTech/OATFWGUI/releases), unzip and run:
diff --git a/assets/screenshot_Linux.jpg b/assets/screenshot_Linux.jpg
index 8f79fa5..ba931c8 100644
Binary files a/assets/screenshot_Linux.jpg and b/assets/screenshot_Linux.jpg differ
diff --git a/assets/screenshot_Windows.jpg b/assets/screenshot_Windows.jpg
index 06190cb..1dbc768 100644
Binary files a/assets/screenshot_Windows.jpg and b/assets/screenshot_Windows.jpg differ
diff --git a/scripts/OATFWGUI_Linux.sh b/scripts/OATFWGUI_Linux.sh
index 9f68ff2..6926378 100755
--- a/scripts/OATFWGUI_Linux.sh
+++ b/scripts/OATFWGUI_Linux.sh
@@ -81,6 +81,9 @@ function set_supported_python_path {
       # python not available either
       echo "Could not find a python install. (tried python3, python)."
       echo "Please install python3"
+        echo "
+If you know you have python installed, try overriding the PYTHON environment variable when starting this script
+i.e. PYTHON=/usr/bin/python3.9 ./OATFWGUI_Linux.sh"
       exit 1
     else
       # python is a command
@@ -88,6 +91,9 @@ function set_supported_python_path {
       if ! check_py_version; then
         # check_py_version already gives an error message
         echo "python version is not valid (tried python3, but it's not installed)"
+        echo "
+If you have another version of python installed, try overriding the PYTHON environment variable when starting this script
+i.e. PYTHON=/usr/bin/python3.9 ./OATFWGUI_Linux.sh"
         exit 1
       fi
       # Ok! python is a valid command, and is a supported version
@@ -98,6 +104,9 @@ function set_supported_python_path {
     if ! check_py_version; then
       # check_py_version already gives an error message
       echo "python3 version is not valid"
+        echo "
+If you have another version of python installed, try overriding the PYTHON environment variable when starting this script
+i.e. PYTHON=/usr/bin/python3.9 ./OATFWGUI_Linux.sh"
       exit 1
     fi
   fi