--- CMakeLists.txt.orig	2020-12-17 22:57:53.000000000 -0500
+++ CMakeLists.txt	2020-12-17 22:58:49.000000000 -0500
@@ -146,14 +146,6 @@
     add_definitions(-DWIN32)
 elseif (APPLE)
     message("Target OS     : Mac OS X")
-    # to be compatible back to Mac OS X 10.7
-    if (IQTREE_FLAGS MATCHES "oldmac")
-        add_definitions("-mmacosx-version-min=10.5")
-        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -mmacosx-version-min=10.5")
-    else()
-        add_definitions("--target=x86_64-apple-macos10.7")
-        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --target=x86_64-apple-macos10.7")
-    endif()
     SET(CMAKE_FIND_LIBRARY_SUFFIXES .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
 elseif (UNIX)
     message("Target OS     : Unix")