[R-SIG-Mac] How to revert back to R 2.11

Steve Lianoglou mailinglist.honeypot at gmail.com
Sun Nov 14 21:46:21 CET 2010

Hi Steven,

Are you still having problems?

I'd be surprised if R-2.12 itself has anything to do with the problems
you're seeing, but assuming 2.11 is still on your system, you can
switch to it easily by using Rswitch, that you can find here:


It assumes 2.11 was installed via the normal R installers, ie. it lives in:


A few Q's for you:

(1) Did you reinstall your R libraries for 2.12 from scratch (good
idea) , or did you copy them over from your 2.11 install (bad idea)

(2) Are you using R from R.app or from the terminal?

(2a) When you run are from the Terminal, does it still exhibit this behavior?
(2b) How about if you start R with the --vanilla flag?, eg:

$ R --vanilla

If you want to completely uninstall R 2.12 and start from scratch, you
can do that from the terminal, too:

$ sudo rm -Rf /Library/Frameworks/R.framework/Versions/2.12

Hope that helps,

btw - I don't think "MAC" needs to be capitalized ... it's not an acronym ;-)

On Fri, Nov 12, 2010 at 3:50 PM, steven mosher <moshersteven at gmail.com> wrote:
> I recently noticed that R was having memory "race" condition on my MAC. At
> start up it would race to 1.3GB of memory used. Just on start up. For no
> apparent reason. Then it would release memory and fall back down to 50-60MB.
> Upon opening any window to edit old files or
> start a new one, the race would come back. programs that used to execute in
> short periods would take forever. Often not completing after hours.
> So:
> 1. did did a MAC system update ( Leopard)
> 2. installed R 2.12
> 3. X11 gets clobbered so I had to reinstall that.
> 4. RGDAL had to be reinstalled but I was able to make that work after some
> time.
> Now raster programs that worked an hour ago are broken and I found out that
> ncdf is not available yet.
> What's the simplest way to revert to R 2.11  and diagnose the memory race I
> seem to be having.
>        [[alternative HTML version deleted]]
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Steve Lianoglou
Graduate Student: Computational Systems Biology
 | Memorial Sloan-Kettering Cancer Center
 | Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact

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