--- a/taskcluster/taskgraph/util/workertypes.py
+++ b/taskcluster/taskgraph/util/workertypes.py
@@ -4,31 +4,28 @@
 
 from __future__ import absolute_import, print_function, unicode_literals
 
 WORKER_TYPES = {
     'aws-provisioner-v1/gecko-1-b-android': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-1-b-linux': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-1-b-linux-large': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-1-b-linux-xlarge': ('docker-worker', 'linux'),
-    'aws-provisioner-v1/gecko-1-b-macosx64': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-1-b-win2012': ('generic-worker', 'windows'),
     'aws-provisioner-v1/gecko-1-images': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-2-b-android': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-2-b-linux': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-2-b-linux-large': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-2-b-linux-xlarge': ('docker-worker', 'linux'),
-    'aws-provisioner-v1/gecko-2-b-macosx64': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-2-b-win2012': ('generic-worker', 'windows'),
     'aws-provisioner-v1/gecko-2-images': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-3-b-android': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-3-b-linux': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-3-b-linux-large': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-3-b-linux-xlarge': ('docker-worker', 'linux'),
-    'aws-provisioner-v1/gecko-3-b-macosx64': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-3-b-win2012': ('generic-worker', 'windows'),
     'aws-provisioner-v1/gecko-3-images': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-symbol-upload': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-t-linux-large': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-t-linux-medium': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-t-linux-xlarge': ('docker-worker', 'linux'),
     'aws-provisioner-v1/gecko-t-win10-64': ('generic-worker', 'windows'),
     'aws-provisioner-v1/gecko-t-win10-64-gpu': ('generic-worker', 'windows'),