diff --git a/3rdparty/discord-rpc/CMakeLists.txt b/3rdparty/discord-rpc/CMakeLists.txt
index 1877bb61d..cf6c2f0d6 100644
--- a/3rdparty/discord-rpc/CMakeLists.txt
+++ b/3rdparty/discord-rpc/CMakeLists.txt
@@ -33,6 +33,13 @@ if(APPLE)
   target_link_libraries(discord-rpc PRIVATE "-framework AppKit")
 endif()
 
+# RapidJSON (as packaged by Homebrew and others) can trigger C++17 deprecation
+# warnings (e.g. std::iterator) when compiled with AppleClang/libc++.
+# Keep the suppression narrowly scoped to this 3rdparty target.
+if(APPLE AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  target_compile_options(discord-rpc PRIVATE -Wno-deprecated-declarations)
+endif()
+
 if(WIN32)
   target_link_libraries(discord-rpc PRIVATE psapi advapi32)
 endif()
diff --git a/CMakeLists.txt b/CMakeLists.txt
index bc594050e..7275b4469 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1517,6 +1517,21 @@ qt_add_resources(SOURCES data/data.qrc data/icons.qrc)
 
 add_library(strawberry_lib STATIC ${SOURCES})
 
+# Treat Boost headers as system headers to avoid noisy warnings from 3rdparty
+# Boost code (e.g. -Wold-style-cast) when building Strawberry with strict flags.
+set(_strawberry_boost_system_includes "")
+if(TARGET Boost::headers)
+  get_target_property(_strawberry_boost_system_includes Boost::headers INTERFACE_INCLUDE_DIRECTORIES)
+elseif(TARGET Boost::boost)
+  get_target_property(_strawberry_boost_system_includes Boost::boost INTERFACE_INCLUDE_DIRECTORIES)
+elseif(DEFINED Boost_INCLUDE_DIRS)
+  set(_strawberry_boost_system_includes "${Boost_INCLUDE_DIRS}")
+endif()
+if(_strawberry_boost_system_includes)
+  target_include_directories(strawberry_lib SYSTEM PRIVATE ${_strawberry_boost_system_includes})
+endif()
+unset(_strawberry_boost_system_includes)
+
 target_sources(strawberry PRIVATE src/main.cpp)
 
 if(WIN32)