diff --git a/README.md b/README.md
index 5d170ac25..a19b56fc4 100755
--- a/README.md
+++ b/README.md
@@ -388,6 +388,8 @@ Supported operating systems and hardware:
 
 ## History
 
+* v1.0, 2015-03-17, remove the osx for 1.0.30.
+* v1.0, 2015-02-17, the join maybe failed, should use a variable to ensure thread terminated. 1.0.28.
 * <strong>v1.0, 2015-02-12, [1.0r2 release(1.0.27)](https://github.com/winlinvip/simple-rtmp-server/releases/tag/1.0r2) released. 59507 lines.</strong>
 * v1.0, 2015-02-11, dev code HuKaiqun for 1.0.27.
 * v1.0, 2015-02-10, for [#310](https://github.com/winlinvip/simple-rtmp-server/issues/310), the aac profile must be object plus one. 1.0.26
diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index 05ccc196d..b5659d2da 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -299,6 +299,11 @@ function OSX_prepare()
 }
 OSX_prepare; ret=$?; if [[ 0 -ne $ret ]]; then echo "OSX prepare failed, ret=$ret"; exit $ret; fi
 
+# by winlin, disable other system.
+if [[ $OS_IS_UBUNTU = NO && $OS_IS_CENTOS = NO && $SRS_EMBEDED_CPU = NO ]]; then
+    echo "only support Centos and Ubuntu, actual is `uname -s`"
+    exit 1
+fi
 
 #####################################################################################
 # st-1.9
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index 66d358edd..8110b5f3b 100644
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -161,7 +161,6 @@ Options:
 
 Presets:
   --x86-x64                 [default] for x86/x64 cpu, common pc and servers.
-  --osx                     for IOS(darwin) to build SRS.
   --pi                      for raspberry-pi(directly build), open features hls/ssl/static.
   --cubie                   for cubieboard(directly build), open features except ffmpeg/nginx.
   --arm                     alias for --with-arm-ubuntu12, for ubuntu12, arm crossbuild
@@ -252,7 +251,6 @@ function parse_user_option() {
         --log-trace)                    SRS_LOG_TRACE=YES           ;;
         
         --x86-x64)                      SRS_X86_X64=YES             ;;
-        --osx)                          SRS_OSX=YES                 ;;
         --arm)                          SRS_ARM_UBUNTU12=YES        ;;
         --mips)                         SRS_MIPS_UBUNTU12=YES       ;;
         --pi)                           SRS_PI=YES                  ;;
diff --git a/trunk/src/app/srs_app_thread.cpp b/trunk/src/app/srs_app_thread.cpp
index bc18333f0..99fc70028 100644
--- a/trunk/src/app/srs_app_thread.cpp
+++ b/trunk/src/app/srs_app_thread.cpp
@@ -120,7 +120,11 @@ void SrsThread::stop()
         st_thread_interrupt(tid);
         
         // wait the thread to exit.
-        st_thread_join(tid, NULL);
+        int ret = st_thread_join(tid, NULL);
+        // TODO: FIXME: the join maybe failed, should use a variable to ensure thread terminated.
+        if (ret != 0) {
+            srs_warn("join thread failed. code=%d", ret);
+        }
         
         tid = NULL;
     }
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index 6109a6454..10f705ee2 100644
--- a/trunk/src/core/srs_core.hpp
+++ b/trunk/src/core/srs_core.hpp
@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR       1
 #define VERSION_MINOR       0
-#define VERSION_REVISION    27
+#define VERSION_REVISION    30 
 
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"