Update pycbc_live

bin/pycbc_live

@@ -111,19 +111,21 @@ class LiveEventManager(object):
         if self.run_snr_optimization:
             # preestimate the number of CPU cores that we can afford giving
             # to followup processes without slowing down the main search
-                # if the machine isn't a mac
+            bg_cores = len(tuple(itertools.combinations(ifos, 2)))
+            analysis_cores = 1 + bg_cores
             if platform.system() != 'Darwin':
                 available_cores = len(os.sched_getaffinity(0))
+                self.fu_cores = available_cores - analysis_cores
+                if self.fu_cores <= 0:
+                    logging.warning(
+                        'Insufficient number of CPU cores (%d) to '
+                        'run search and trigger followups. Uploaded '
+                        'triggers will momentarily increase the lag',
+                        available_cores
+                    )
+                    self.fu_cores = 1
             else:
-                available_cores = multiprocessing.cpu_count()
-            bg_cores = len(tuple(itertools.combinations(ifos, 2)))
-            analysis_cores = 1 + bg_cores
-            self.fu_cores = available_cores - analysis_cores
-            if self.fu_cores <= 0:
-                logging.warning('Insufficient number of CPU cores (%d) to '
-                                'run search and trigger followups. Uploaded '
-                                'triggers will momentarily increase the lag',
-                                available_cores)
+                # To enable mac testing, this is just set to 1
                 self.fu_cores = 1
 
         if args.enable_embright_has_massgap: