[R-SIG-Mac] detecting cores

[Prof Brian Ripley]

sysctl on 10.11 has options which would enable us to differentiate 
between logical and physical codes on parallel::detectCores --- however 
these are not documented in Apple's online man pages, which are for 
10.9.  Could someone running 10.9 and someone for 10.10 report if

/usr/sbin/sysctl -n hw.physicalcpu
/usr/sbin/sysctl -n hw.logicalcpu

run in a terminal work and gives the correct result?  (Normally the 
second will be twice the first taking account of hyperthreading.)

Thanks in advance.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford