Support get_disks_macOS() on older macOS versions

scripts/wk/hw/obj.py

@@ -727,7 +727,13 @@ def get_disks_macos():
   disks = []
 
   # Get info from diskutil
-  proc = run_program(cmd, encoding=None, errors=None)
+  proc = run_program(cmd, encoding=None, errors=None, check=False)
+  if proc.returncode != 0:
+    # Assuming we're running on an older macOS version
+    cmd.pop(-1)
+    proc = run_program(cmd, encoding=None, errors=None, check=False)
+
+  # Parse plist data
   try:
     plist_data = plistlib.loads(proc.stdout)
   except (TypeError, ValueError):
@@ -739,6 +745,11 @@ def get_disks_macos():
   for disk in plist_data['WholeDisks']:
     disks.append(Disk(f'/dev/{disk}'))
 
+  # Remove virtual disks
+  disks = [
+    d for d in disks if d.details.get('VirtualOrPhysical') == 'Physical'
+    ]
+
   # Done
   return disks