diff --git a/lldb/CMakeLists.txt b/lldb/CMakeLists.txt
--- a/lldb/CMakeLists.txt
+++ b/lldb/CMakeLists.txt
@@ -72,6 +72,20 @@
     message(FATAL_ERROR "LLDB test compilers not specified.  Tests will not run")
   endif()
 
+  # On MacOS, debugserver needs to be codesigned. Check if we have a certificate instead
+  # of failing in the middle of the build.
+  if(CMAKE_SYSTEM_NAME MATCHES "Darwin" AND TARGET debugserver)
+    execute_process(
+      COMMAND security find-certificate -Z -p -c lldb_codesign /Library/Keychains/System.keychain
+      RESULT_VARIABLE cert_return
+      OUTPUT_QUIET
+      ERROR_QUIET)
+
+    if (cert_return)
+      message(FATAL_ERROR "Certificate for debugserver not found. Run scripts/macos-setup-codesign.sh")
+    endif()
+  endif()
+
   set(LLDB_TEST_DEPS lldb)
 
   # darwin-debug is an hard dependency for the testsuite.