this time it surely works on bsd

modules/memory-usage.sh

@@ -14,11 +14,19 @@ get_mem_info() {
 
     # macOS / BSD via sysctl
     if command -v sysctl >/dev/null 2>&1; then
+
         # total memory
-        mem_total=$(sysctl -n hw.memsize 2>/dev/null)
-        if [ -n "$mem_total" ]; then
-            # convert bytes → kB
-            mem_total=$(expr "$mem_total" / 1024)
+        mem_total_bytes=$(
+            sysctl -n hw.memsize 2>/dev/null || \
+            sysctl -n hw.realmem 2>/dev/null || \
+            sysctl -n hw.physmem 2>/dev/null || \
+            sysctl -n hw.physmem64 2>/dev/null
+        )
+
+        if [ -n "$mem_total_bytes" ] 2>/dev/null; then
+            mem_total=$(expr "$mem_total_bytes" / 1024)   # convert to kB
+        else
+            mem_total=""
         fi
 
         # available memory varies by OS; fallback to inactive + free