diff --git a/netci.groovy b/netci.groovy
index 8c635dc692e444effafaeb29029ae7330e9734c1..d53132101c48a8609e4ef78b7b7077e73fe7a116 100644
--- a/netci.groovy
+++ b/netci.groovy
@@ -121,7 +121,7 @@ commitPullList.each { isPr ->
 
   def triggerPhraseOnly = true
   def triggerPhraseExtra = "mac"
-  Utilities.setMachineAffinity(myJob, 'OSX10.11', 'latest-or-auto')
+  Utilities.setMachineAffinity(myJob, 'OSX10.12', 'latest-or-auto')
   Utilities.addXUnitDotNETResults(myJob, '**/xUnitResults/*.xml')
   addRoslynJob(myJob, jobName, branchName, isPr, triggerPhraseExtra, triggerPhraseOnly)
   }