--- DistUpgradeQuirks.py.original       2021-06-07 12:46:50.110000000 +0100
+++ DistUpgradeQuirks.py        2021-06-07 12:47:17.310000000 +0100
@@ -373,9 +373,7 @@
         system to be upgraded. LP: #1928434
         """
         vendor = self._readDMIVendor()
-        if vendor == '':
-            logging.error("System vendor is unknown")
-        elif vendor.startswith('Apple Inc.') or \
+        if vendor.startswith('Apple Inc.') or \
                 vendor.startswith('Apple Computer, Inc.'):
             logging.error("System vendor is Apple")
         else: