diff --git a/README.md b/README.md
index 93d739436..f66f21240 100755
--- a/README.md
+++ b/README.md
@@ -201,6 +201,7 @@ For previous versions, please read:
 
 ## V3 changes
 
+* v3.0, 2020-10-23, Allow FFmpeg if exists at /usr/local/bin/ffmpeg. 3.0.147
 * v3.0, 2020-10-23, Refine build script, use libssl in docker. 3.0.146
 * v3.0, 2020-10-14, Fix [#1987][bug #1987], Fix Kbps resample bug. 3.0.145
 * <strong>v3.0, 2020-10-10, [3.0 release1(3.0.144)][r3.0r1] released. 122674 lines.</strong>
diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index 5e4b29c32..a66069f73 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -649,7 +649,7 @@ fi
 # live transcoding, ffmpeg-4.1, x264-core157, lame-3.99.5, libaacplus-2.0.2.
 #####################################################################################
 # Always link the ffmpeg tools if exists.
-if [[ -f /usr/local/bin/ffmpeg && ! -f ${SRS_OBJS}/ffmpeg/bin/ffmpeg ]]; then
+if [[ -f /usr/local/bin/ffmpeg && ! -f ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg ]]; then
     mkdir -p ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg/bin &&
     ln -sf /usr/local/bin/ffmpeg ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg/bin/ffmpeg &&
     (cd ${SRS_OBJS} && rm -rf ffmpeg && ln -sf ${SRS_PLATFORM}/ffmpeg)
@@ -662,6 +662,7 @@ if [ $SRS_FFMPEG_TOOL = YES ]; then
         echo "    please copy it from srs-docker";
         echo "    or download from http://ffmpeg.org/download.html";
         echo "    or disable it by --without-ffmpeg";
+        exit -1;
     fi
     # Always update the links.
     if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg ]]; then
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index d3a6111c6..6aecb5ac2 100755
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -590,12 +590,6 @@ function check_option_conflicts() {
         SRS_NGINX=NO
     fi
 
-    # For OSX, recommend to use DTrace, https://blog.csdn.net/win_lin/article/details/53503869
-    if [[ $SRS_OSX == YES && $SRS_GPROF == YES ]]; then
-        echo "Tool gprof for OSX is unavailable, please use dtrace, read https://blog.csdn.net/win_lin/article/details/53503869"
-        exit -1
-    fi
-
     # TODO: FIXME: check more os.
 
     __check_ok=YES
diff --git a/trunk/src/core/srs_core_version3.hpp b/trunk/src/core/srs_core_version3.hpp
index 4f18f8a52..b29289a07 100644
--- a/trunk/src/core/srs_core_version3.hpp
+++ b/trunk/src/core/srs_core_version3.hpp
@@ -24,6 +24,6 @@
 #ifndef SRS_CORE_VERSION3_HPP
 #define SRS_CORE_VERSION3_HPP
 
-#define SRS_VERSION3_REVISION 146
+#define SRS_VERSION3_REVISION 147
 
 #endif