sys.ram* more accurate

Author: scivision

+stdlib/+sys/ram_free.m

@@ -5,14 +5,18 @@
 if ispc()
   cmd = 'pwsh -c "(Get-CimInstance -ClassName CIM_OperatingSystem).FreePhysicalMemory * 1KB"';
 elseif ismac()
-  cmd = 'sysctl -n hw.memsize';
+  cmd = 'sysctl -n vm.page_free_count';
 else
   cmd = "free -b | awk '/Mem:/ {print $4}'";
 end
 
 [s, m] = system(cmd);
 if s == 0
   bytes = str2double(m);
+  if ismac()
+    bytes = bytes * 4096; % Assuming a page size of 4096 bytes
+  end
+
 end
 
 bytes = uint64(bytes);

+stdlib/+sys/ram_total.m

@@ -7,7 +7,7 @@
 elseif ismac()
   cmd = 'sysctl -n hw.memsize';
 else
-  cmd = "free -b | awk '/Mem:/ {print $4}'";
+  cmd = "free -b | awk '/Mem:/ {print $2}'";
 end
 
 [s, m] = system(cmd);