Bug 1678641 - add support to mozinfo for apple_silicon. r=releng-reviewers,aki

Differential Revision: https://phabricator.services.mozilla.com/D97767

taskcluster/taskgraph/transforms/job/mozharness_test.py

@@ -369,7 +369,10 @@ def mozharness_test_on_generic_worker(config, job, taskdesc):
     elif is_bitbar:
         py_binary = "python3" if py_3 else "python"
         mh_command = ["bash", "./{}".format(bitbar_script)]
-    elif is_macosx and "macosx1014-64" in test["test-platform"]:
+    elif is_macosx and (
+        "macosx1014-64" in test["test-platform"]
+        or "macosx1100-64" in test["test-platform"]
+    ):
         py_binary = "/usr/local/bin/{}".format("python3" if py_3 else "python2")
         mh_command = [
             py_binary,

testing/mozbase/mozinfo/mozinfo/mozinfo.py

@@ -149,9 +149,19 @@ elif sys.platform in ("solaris", "sunos5"):
 else:
     os_version = version = unknown
 
+info["apple_silicon"] = False
+if (
+    info["os"] == "mac"
+    and float(os_version) > 10.15
+    and processor == "i386"
+    and bits == "64bit"
+):
+    info["apple_silicon"] = True
+
 info["version"] = version
 info["os_version"] = StringVersion(os_version)
 
+
 # processor type and bits
 if processor in ["i386", "i686"]:
     if bits == "32bit":