diff --git a/CHANGED b/CHANGED
index 9b90b5ca9..a64ccffe5 100644
--- a/CHANGED
+++ b/CHANGED
@@ -1,6 +1,7 @@
 # Add changes at the top of the list. Keep it in ASCII, and 80-char wide.
 # Do not insert empty lines here, update check depends on it.
 - SVN
+  - bugfix:  fhem.pl: write-select to avoid blocking in inform/Event Monitor
   - bugfix:  fix issue with DST changes in 57_Calendar.pm
   - feature: new module 36_LaCrosse.pm for LaCrosse IT+ temperature and
              humidity sensors with a JeeLabs JeeLink as RF modem.
diff --git a/FHEM/01_FHEMWEB.pm b/FHEM/01_FHEMWEB.pm
index d28e6100e..527230e17 100755
--- a/FHEM/01_FHEMWEB.pm
+++ b/FHEM/01_FHEMWEB.pm
@@ -1949,34 +1949,14 @@ FW_Notify($$)
         push @data,("$tn $dt $dn ".$dev->{CHANGED}[$i]."<br>");
       }
     }
-
   }
 
   if(@data) {
-    # Collect multiple changes (e.g. from notifiees) into one message
-    $ntfy->{INFORMBUF} .= join("\n", map { s/\n/ /gm; $_ } @data)."\n";
-    RemoveInternalTimer($ln);
-    if(length($ntfy->{INFORMBUF}) > 1024) {
-      FW_FlushInform($ln);
-    } else {
-      InternalTimer(gettimeofday()+0.1, "FW_FlushInform", $ln, 0);
-    }
+     addToWritebuffer($ntfy, join("\n", map { s/\n/ /gm; $_ } @data)."\n");
   }
-
   return undef;
 }
 
-sub
-FW_FlushInform($)
-{
-  my ($name) = @_;
-  my $hash = $defs{$name};
-  return if(!$hash);
-  my $c = $hash->{CD};
-  print $c $hash->{INFORMBUF};
-  $hash->{INFORMBUF}="";
-}
-
 ###################
 # Compute the state (==second) column
 sub
diff --git a/FHEM/TcpServerUtils.pm b/FHEM/TcpServerUtils.pm
index 35a84ff02..d25e29df2 100644
--- a/FHEM/TcpServerUtils.pm
+++ b/FHEM/TcpServerUtils.pm
@@ -28,6 +28,7 @@ TcpServer_Open($$$)
     LocalHost => ($global ? undef : "localhost"),
     LocalPort => $port,
     Listen    => 10,
+    Blocking  => 0, # Needed for .WRITEBUFFER@darwin
     ReuseAddr => 1
   );
   $hash->{STATE} = "Initialized";