diff --git a/.github/workflows/macos_14.yml b/.github/workflows/macos_14.yml
new file mode 100644
index 00000000..fba436ae
--- /dev/null
+++ b/.github/workflows/macos_14.yml
@@ -0,0 +1,26 @@
+name: Build on macOS 14
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: macos-14
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          brew install boost cryptopp fmt fcgi yajl libmemcached libpqxx postgresql
+
+      - name: build
+        run: |
+            mkdir build && cd build && \
+            CXXFLAGS="-Wall -Wextra -Wpedantic -Wno-unused-parameter" cmake .. -DBUILD_SHARED_LIBS=OFF -DBUILD_TESTING=ON -DCMAKE_BUILD_TYPE=Release && \
+            make -j${nproc} && \
+            ctest --output-on-failure -E "db"
+
+      - name: Running openstreetmap-cgimap
+        run: |
+           ./build/openstreetmap-cgimap --help
diff --git a/contrib/sjparser/library/CMakeLists.txt b/contrib/sjparser/library/CMakeLists.txt
index e834af06..cb8468b6 100644
--- a/contrib/sjparser/library/CMakeLists.txt
+++ b/contrib/sjparser/library/CMakeLists.txt
@@ -1,7 +1,4 @@
-find_library(YAJL_LIB yajl)
-if(NOT YAJL_LIB)
-  message(FATAL_ERROR "Can't find yajl library")
-endif()
+find_package(YAJL 2 REQUIRED)
 
 add_library(sjparser STATIC
   sjparser/parsing_error.cpp
@@ -42,7 +39,7 @@ set_target_properties(sjparser PROPERTIES OUTPUT_NAME sjparser_static)
 
 setup_compilation_options(sjparser)
 
-target_link_libraries(sjparser PUBLIC ${YAJL_LIB})
+target_link_libraries(sjparser PUBLIC YAJL::YAJL)
 
 target_include_directories(sjparser PUBLIC
   $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
@@ -60,7 +57,7 @@ if(SJPARSER_BUILD_SHARED_LIBRARY)
 
   setup_compilation_options(sjparser_shared)
 
-  target_link_libraries(sjparser_shared PUBLIC ${YAJL_LIB})
+  target_link_libraries(sjparser_shared PUBLIC YAJL::YAJL)
 
   target_include_directories(sjparser_shared PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
diff --git a/include/cgimap/api06/changeset_upload/node.hpp b/include/cgimap/api06/changeset_upload/node.hpp
index 870e39d7..cb63bdad 100644
--- a/include/cgimap/api06/changeset_upload/node.hpp
+++ b/include/cgimap/api06/changeset_upload/node.hpp
@@ -32,6 +32,7 @@ class Node : public OSMObject {
 
     double _lat;
 
+#if !defined(__APPLE__)
     auto [_, ec] = std::from_chars(lat.data(), lat.data() + lat.size(), _lat);
 
     if (ec == std::errc())
@@ -42,12 +43,26 @@ class Node : public OSMObject {
       throw payload_error("Latitude value is too large");
     else
       throw payload_error("Unexpected parsing error");
+
+#else
+
+    try {
+      _lat = std::stod(lat);
+    } catch (std::invalid_argument &e) {
+      throw payload_error("Latitude is not numeric");
+    } catch (std::out_of_range &e) {
+      throw payload_error("Latitude value is too large");
+    }
+    set_lat(_lat);
+
+#endif
   }
 
   void set_lon(const std::string &lon) {
 
     double _lon;
 
+#if !defined(__APPLE__)
     auto [_, ec] = std::from_chars(lon.data(), lon.data() + lon.size(), _lon);
 
     if (ec == std::errc())
@@ -58,6 +73,20 @@ class Node : public OSMObject {
       throw payload_error("Longitude value is too large");
     else
       throw payload_error("Unexpected parsing error");
+
+#else
+
+    try {
+      _lon = std::stod(lon);
+    } catch (std::invalid_argument &e) {
+      throw payload_error("Longitude is not numeric");
+    } catch (std::out_of_range &e) {
+      throw payload_error("Longitude value is too large");
+    }
+
+    set_lon(_lon);
+
+#endif
   }
 
   void set_lat(double lat) {
diff --git a/include/cgimap/backend/apidb/pqxx_string_traits.hpp b/include/cgimap/backend/apidb/pqxx_string_traits.hpp
index 7e64f672..01f31c90 100644
--- a/include/cgimap/backend/apidb/pqxx_string_traits.hpp
+++ b/include/cgimap/backend/apidb/pqxx_string_traits.hpp
@@ -116,7 +116,7 @@ struct array_string_traits
   template<>                                                            \
   struct string_traits<type> : cgimap::array_string_traits<type> {};    \
                                                                         \
-  template<> std::string const type_name<type>{#type};                  \
+  template<> inline std::string const type_name<type>{#type};           \
 
 
 #endif
@@ -127,7 +127,6 @@ PQXX_ARRAY_STRING_TRAITS(std::vector<tile_id_t>);
 PQXX_ARRAY_STRING_TRAITS(std::vector<osm_changeset_id_t>);
 PQXX_ARRAY_STRING_TRAITS(std::set<osm_changeset_id_t>);
 PQXX_ARRAY_STRING_TRAITS(std::vector<std::string>);
-PQXX_ARRAY_STRING_TRAITS(std::vector<bool>);
 
 } // namespace pqxx
 
diff --git a/include/cgimap/util.hpp b/include/cgimap/util.hpp
index f32ec00f..5183e79d 100644
--- a/include/cgimap/util.hpp
+++ b/include/cgimap/util.hpp
@@ -27,8 +27,33 @@
 
 #include <fmt/core.h>
 #include <fmt/format.h>
+#include <fmt/ranges.h>
 
 
+#if __APPLE__
+// NOTE: <codecvt> is deprecated in C++17 and removed in C++26 (see P2871R3).
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated"
+
+#include <codecvt>
+#include <iomanip>
+#include <stdexcept>
+
+inline std::size_t unicode_strlen(const std::string& utf8)
+{
+
+  try {
+    return std::wstring_convert< std::codecvt_utf8<char32_t>, char32_t >{}.from_bytes(utf8).size();
+  } catch(std::range_error) {
+    throw http::bad_request("Invalid UTF-8 string encountered");
+  }
+}
+
+#pragma clang diagnostic pop
+
+#else
+
 inline size_t unicode_strlen(const std::string & s)
 {
    const char* mbstr = s.c_str();
@@ -43,6 +68,8 @@ inline size_t unicode_strlen(const std::string & s)
    return len;
 }
 
+#endif
+
 inline std::string escape(std::string_view input) {
 
   int n = 0;
diff --git a/src/backend/apidb/changeset_upload/relation_updater.cpp b/src/backend/apidb/changeset_upload/relation_updater.cpp
index 87ed7959..c35ec4c4 100644
--- a/src/backend/apidb/changeset_upload/relation_updater.cpp
+++ b/src/backend/apidb/changeset_upload/relation_updater.cpp
@@ -1239,17 +1239,16 @@ void ApiDB_Relation_Updater::update_current_relations(
 
   m.prepare("update_current_relations",
             R"(   
-        WITH u(id, changeset_id, visible, version) AS (
+        WITH u(id, changeset_id, version) AS (
                 SELECT * FROM
                 UNNEST( CAST($1 AS bigint[]),
                         CAST($2 AS bigint[]),
-                        CAST($3 AS boolean[]),
-                        CAST($4 AS bigint[])
+                        CAST($3 AS bigint[])
                       )
         )
         UPDATE current_relations AS r
         SET changeset_id = u.changeset_id,
-            visible = u.visible,
+            visible = CAST($4 as boolean),
             timestamp = (now() at time zone 'utc'),
             version = u.version + 1
         FROM u
@@ -1260,20 +1259,18 @@ void ApiDB_Relation_Updater::update_current_relations(
 
   std::vector<osm_nwr_signed_id_t> ids;
   std::vector<osm_changeset_id_t> cs;
-  std::vector<bool> visibles;
   std::vector<osm_version_t> versions;
   std::map<osm_nwr_id_t, osm_nwr_signed_id_t> id_to_old_id;
 
   for (const auto &relation : relations) {
     ids.emplace_back(relation.id);
     cs.emplace_back(relation.changeset_id);
-    visibles.push_back(visible);
     versions.emplace_back(relation.version);
     id_to_old_id[relation.id] = relation.old_id;
   }
 
   pqxx::result r =
-      m.exec_prepared("update_current_relations", ids, cs, visibles, versions);
+      m.exec_prepared("update_current_relations", ids, cs, versions, visible);
 
   if (r.affected_rows() != relations.size())
     throw http::server_error("Could not update all current relations");
diff --git a/src/backend/apidb/changeset_upload/way_updater.cpp b/src/backend/apidb/changeset_upload/way_updater.cpp
index c20233d0..22e39a18 100644
--- a/src/backend/apidb/changeset_upload/way_updater.cpp
+++ b/src/backend/apidb/changeset_upload/way_updater.cpp
@@ -642,17 +642,16 @@ void ApiDB_Way_Updater::update_current_ways(const std::vector<way_t> &ways,
     return;
 
   m.prepare("update_current_ways", R"(
-      WITH u(id, changeset_id, visible, version) AS (
+      WITH u(id, changeset_id, version) AS (
          SELECT * FROM
          UNNEST( CAST($1 AS bigint[]),
                  CAST($2 AS bigint[]),
-                 CAST($3 AS boolean[]),
-                 CAST($4 AS bigint[])
+                 CAST($3 AS bigint[])
               )
       )
       UPDATE current_ways AS w
       SET changeset_id = u.changeset_id,
-         visible = u.visible,
+         visible = CAST($4 as boolean),
          timestamp = (now() at time zone 'utc'),
          version = u.version + 1
          FROM u
@@ -663,20 +662,18 @@ void ApiDB_Way_Updater::update_current_ways(const std::vector<way_t> &ways,
 
   std::vector<osm_nwr_signed_id_t> ids;
   std::vector<osm_changeset_id_t> cs;
-  std::vector<bool> visibles;
   std::vector<osm_version_t> versions;
   std::map<osm_nwr_id_t, osm_nwr_signed_id_t> id_to_old_id;
 
   for (const auto &way : ways) {
     ids.emplace_back(way.id);
     cs.emplace_back(way.changeset_id);
-    visibles.push_back(visible);
     versions.emplace_back(way.version);
     id_to_old_id[way.id] = way.old_id;
   }
 
   pqxx::result r =
-      m.exec_prepared("update_current_ways", ids, cs, visibles, versions);
+      m.exec_prepared("update_current_ways", ids, cs, versions, visible);
 
   if (r.affected_rows() != ways.size())
     throw http::server_error("Could not update all current ways");
diff --git a/src/backend/apidb/pgsql_update.cpp b/src/backend/apidb/pgsql_update.cpp
index f4ca9f61..703b0063 100644
--- a/src/backend/apidb/pgsql_update.cpp
+++ b/src/backend/apidb/pgsql_update.cpp
@@ -176,7 +176,7 @@ uint64_t pgsql_update::get_bbox_size_limit(osm_user_id_t uid)
     auto row = res[0];
     auto bbox_size_limit = row[0].as<int64_t>();
 
-    return std::max(bbox_size_limit, 0L);
+    return (bbox_size_limit < 0 ? 0 : bbox_size_limit);
   }
 }
 
diff --git a/src/fcgi_request.cpp b/src/fcgi_request.cpp
index 0b6cd2f1..52a074ed 100644
--- a/src/fcgi_request.cpp
+++ b/src/fcgi_request.cpp
@@ -158,7 +158,7 @@ int fcgi_request::accept_r() {
       } else {
         char err_buf[1024];
         out << "error accepting request: ";
-        if (strerror_r(errno, err_buf, sizeof err_buf) == nullptr) {
+        if (strerror_r(errno, err_buf, sizeof err_buf) == 0) {   // NOLINT(modernize-use-nullptr)
           out << err_buf;
         } else {
           out << "error encountered while getting error message";
diff --git a/src/main.cpp b/src/main.cpp
index 29e91548..f875400d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -77,6 +77,12 @@ void reload(int) {
   reload_requested = true;
 }
 
+#if __APPLE__
+  #ifndef HOST_NAME_MAX
+    #define HOST_NAME_MAX 255
+  #endif
+#endif
+
 /**
  * make a string to be used as the generator header
  * attribute of output files. includes some instance
diff --git a/src/request.cpp b/src/request.cpp
index 0d1ce321..9342924d 100644
--- a/src/request.cpp
+++ b/src/request.cpp
@@ -92,8 +92,8 @@ void request::check_workflow(workflow_status this_stage) {
   } else if (m_workflow_status > this_stage) {
     // oops - workflow is more advanced than the function which called
     // this, so a workflow violation has occurred.
-    throw std::runtime_error(fmt::format("Can't move backwards in the request workflow from {} to {}.",
-                              m_workflow_status, this_stage));
+    throw std::runtime_error(fmt::format("Can't move backwards in the request workflow from {:d} to {:d}.",
+        static_cast<int>(m_workflow_status), static_cast<int>(this_stage)));
   }
 }