diff --git a/CHANGELOG.md b/CHANGELOG.md
index c799add..0e3cb47 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to iNTERCEPT will be documented in this file.
 
+## [2.26.8] - 2026-03-14
+
+### Fixed
+- **acarsdec build failure on macOS** — `HOST_NAME_MAX` is Linux-specific (`<limits.h>`) and undefined on macOS, causing 3 compile errors in `acarsdec.c`. Now patched with `#define HOST_NAME_MAX 255` before building. Also fixed deprecated `-Ofast` flag warning on all macOS architectures (was only patched for arm64). (#187)
+
+---
+
 ## [2.26.7] - 2026-03-14
 
 ### Fixed
diff --git a/config.py b/config.py
index 738593d..b5dfe4d 100644
--- a/config.py
+++ b/config.py
@@ -7,10 +7,17 @@ import os
 import sys
 
 # Application version
-VERSION = "2.26.7"
+VERSION = "2.26.8"
 
 # Changelog - latest release notes (shown on welcome screen)
 CHANGELOG = [
+    {
+        "version": "2.26.8",
+        "date": "March 2026",
+        "highlights": [
+            "Fix acarsdec build failure on macOS (HOST_NAME_MAX undefined)",
+        ]
+    },
     {
         "version": "2.26.7",
         "date": "March 2026",
diff --git a/pyproject.toml b/pyproject.toml
index 1af3762..2da36d2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "intercept"
-version = "2.26.7"
+version = "2.26.8"
 description = "Signal Intelligence Platform - Pager/433MHz/ADS-B/Satellite/WiFi/Bluetooth"
 readme = "README.md"
 requires-python = ">=3.9"
diff --git a/setup.sh b/setup.sh
index 403b5fb..a3f41bd 100755
--- a/setup.sh
+++ b/setup.sh
@@ -751,9 +751,26 @@ install_acarsdec_from_source_macos() {
 
     cd "$tmp_dir/acarsdec"
 
+    # Replace deprecated -Ofast (all macOS, not just arm64)
+    if grep -q '\-Ofast' CMakeLists.txt 2>/dev/null; then
+      sed -i '' 's/-Ofast/-O3 -ffast-math/g' CMakeLists.txt
+      info "Patched deprecated -Ofast flag"
+    fi
+
+    # macOS doesn't have -march=native on arm64
     if [[ "$(uname -m)" == "arm64" ]]; then
-      sed -i '' 's/-Ofast -march=native/-O3 -ffast-math/g' CMakeLists.txt
-      info "Patched compiler flags for Apple Silicon (arm64)"
+      sed -i '' 's/ -march=native//g' CMakeLists.txt
+      info "Removed -march=native for Apple Silicon"
+    fi
+
+    # HOST_NAME_MAX is Linux-specific; macOS uses _POSIX_HOST_NAME_MAX
+    if grep -q 'HOST_NAME_MAX' acarsdec.c 2>/dev/null; then
+      sed -i '' '1i\
+#ifndef HOST_NAME_MAX\
+#define HOST_NAME_MAX 255\
+#endif
+' acarsdec.c
+      info "Patched HOST_NAME_MAX for macOS compatibility"
     fi
 
     if grep -q 'pthread_tryjoin_np' rtl.c 2>/dev/null; then