diff --git a/Platform/Apple/tools/ProRWTS/PRORWTS2#4000 b/Platform/Apple/tools/ProRWTS/PRORWTS2#4000
index aacb60ff..6fca2a79 100644
Binary files a/Platform/Apple/tools/ProRWTS/PRORWTS2#4000 and b/Platform/Apple/tools/ProRWTS/PRORWTS2#4000 differ
diff --git a/Platform/Apple/tools/ProRWTS/prorwts2.s b/Platform/Apple/tools/ProRWTS/prorwts2.s
index 1caedbc9..c452ee3c 100755
--- a/Platform/Apple/tools/ProRWTS/prorwts2.s
+++ b/Platform/Apple/tools/ProRWTS/prorwts2.s
@@ -49,7 +49,7 @@ ver_02 = 1
                                         ;not compatible with allow_subdir, allow_saplings
                                         ;required in RWTS mode if allow_trees is enabled
                 detect_treof = 0        ;detect EOF during read of tree files
-                fast_subindex= 0        ;keep subindex block in memory, requires an additional 512 bytes of RAM
+                fast_subindex= 1        ;keep subindex block in memory, requires an additional 512 bytes of RAM
                                         ;halves the disk access for double the speed (ideal for RWTS mode)
                 allow_sparse = 0        ;enable support for reading sparse files
                 write_sparse = 0        ;enable support for writing to sparse files (blocks are allocated even if empty)