--- core/Makefile	2015-10-19 11:46:17.000000000 -0400
+++ core/osx-makefile	2015-10-19 12:06:49.000000000 -0400
@@ -1,4 +1,4 @@
-PREFIX = /usr/local
+PREFIX = $(PRFX)
 LIBDIR = $(PREFIX)/libexec/mafft
 BINDIR = $(PREFIX)/bin
 MANDIR = $(PREFIX)/share/man/man1
@@ -6,7 +6,7 @@
 
 #MNO_CYGWIN = -mno-cygwin
 
-ENABLE_MULTITHREAD = -Denablemultithread
+#ENABLE_MULTITHREAD = -Denablemultithread
 # Comment out the above line if your compiler 
 # does not support TLS (thread-local strage).
 
