Index: dtrace/README
===================================================================
diff -u -rc4f449cb353be812ba6502ef8e9587e87881f59b -ree6699cdfbf3ad89cccfa9d52dd23767d13f9d73
--- dtrace/README	(.../README)	(revision c4f449cb353be812ba6502ef8e9587e87881f59b)
+++ dtrace/README	(.../README)	(revision ee6699cdfbf3ad89cccfa9d52dd23767d13f9d73)
@@ -1,24 +1,37 @@
 DTrace provider for the Next Scripting Language
 
 This is an implementation of a DTrace provider for the Next Scripting
-Language (nsf). The nsf provider is designed to be used with and
-without the DTrace support for Tcl. Therefore, nsf can be configured
+Language (NSF). The NSF provider is designed to be used with and
+without the DTrace support for Tcl. Therefore, NSF can be configured
 with --with-dtrace also in cases where Tcl was compiled without it.
 
-To enable DTrace, run configure with the flag --enable-dtrace. The
-DTrace support for nsf was developed under Mac OS X, other platforms
-might require some fine tuning to get it running. Please report
-improvements back to the nsf developers.
+To enable DTrace, run configure with the flag --with-dtrace configure
+flag. The DTrace support for NSF was developed under Mac OS X, other
+platforms might require some fine tuning to get it running. Please
+report improvements back to the NSF developers.
 
-Once DTrace support is compiled into nsf, one can run D scripts like
-in the following example:
+In Mac OS X version including System Integrity Protection (SIP), one
+must deactivate SIP for DTrace, first:
 
-   sudo dtrace -q -F -s dtrace/timestamps.d -c "./nxsh tests/object-system.test"
+1) Boot into Recovery OS
+2) Open Terminal
+3) Run: "csrutil disable"
+4) Run: "csrutil enable --without dtrace"
 
-DTrace requires normally that dtrace is run with root permissions. In
-case the provided sample scrips in the dtrace directory don't work the
-following hints might help:
+Once SIP has been disarmed, and once DTrace support is compiled into
+NSF, one can run D scripts like so:
 
+1) (Terminal window 1): sudo dtrace -q -F -s dtrace/timestamps.d -W tclsh
+2) (Terminal window 2): tclsh dtrace/sample.tcl
+
+(Note: The "dtrace -c" option, as shown below, is not operative unless
+SIP is fully disabled: Run "csrutil disable" only, omit the fourth
+step.)
+
+DTrace requires normally that the dtrace command is run with root
+permissions. In case the provided sample scrips in the dtrace
+directory don't work out of the box, the following hints might help:
+
 * Make sure that a "package require nx" works for root as well
   (install nx, or provide a TCLLIBPATH, etc.).  You might want
   to add e.g. the following line