fix run.sh on mac (#1755)

run.sh

@@ -17,7 +17,7 @@ else
   requirements_file="requirements.txt"
 
   # Check if Python 3.8 is installed
-  if ! command -v python3 >/dev/null 2>&1; then
+  if ! command -v python3.8 >/dev/null 2>&1 || pyenv versions --bare | grep -q "3.8"; then
     echo "Python 3 not found. Attempting to install 3.8..."
     if [ "$(uname)" = "Darwin" ] && command -v brew >/dev/null 2>&1; then
       brew install python@3.8
@@ -30,18 +30,18 @@ else
     fi
   fi
 
-  python3 -m venv .venv
+  python3.8 -m venv .venv
   . .venv/bin/activate
 
   # Check if required packages are installed and install them if not
   if [ -f "${requirements_file}" ]; then
-    installed_packages=$(python3 -m pip freeze)
+    installed_packages=$(python3.8 -m pip freeze)
     while IFS= read -r package; do
       expr "${package}" : "^#.*" > /dev/null && continue
       package_name=$(echo "${package}" | sed 's/[<>=!].*//')
       if ! echo "${installed_packages}" | grep -q "${package_name}"; then
         echo "${package_name} not found. Attempting to install..."
-        python3 -m pip install --upgrade "${package}"
+        python3.8 -m pip install --upgrade "${package}"
       fi
     done < "${requirements_file}"
   else
@@ -58,4 +58,4 @@ if [ $? -ne 0 ]; then
 fi
 
 # Run the main script
-python3 infer-web.py --pycmd python3
+python3.8 infer-web.py --pycmd python3.8