Thanks so much for taking the time to respond.   I followed the Xcode instructions in your first paragraph and  instructions and everything is working now as expected.  Not sure what happened before.  As of last year, more that half my students now live in the Mac world, so it seems I need to up my skill level.

Enjoyed the little tcltk exercise/test you supplied.    Thanks again.

Sincerely,

Rob


On 10/3/2017 7:35 PM, Fox, John wrote:
Dear Robert,

As a brief addendum to my previous message, I’ve now installed the newest
version of Xcode, and I still have no trouble using the Rcmdr package.

I did get the following message when I initially loaded the Rcmdr package:
“Agreeing to the Xcode/iOS license requires admin privileges, please run
“sudo xcodebuild -license” and then retry this command.” But the Rcmdr
loaded properly both before *and* after I followed the instruction in the
message.

Best,
  John

-------------------------------------
John Fox, Professor Emeritus
McMaster University
Hamilton, Ontario, Canada
Web: http://socserv.mcmaster.ca/jfox/




On 2017-10-03, 1:03 PM, "R-SIG-Mac on behalf of Fox, John"
<r-sig-mac-boun...@r-project.org on behalf of j...@mcmaster.ca> wrote:

Dear Robert,

The most common Rcmdr problem on macOS is failure to install XQuartz,
which is required by the tcltk package. If you haven't installed XQuartz,
then start there, and remember to reboot after the XQuartz installation:
<https://www.xquartz.org/>. For more details, please see the Rcmdr
installation notes for macOS at
<http://socserv.socsci.mcmaster.ca/jfox/Misc/Rcmdr/installation-notes.html
. You should be able to use the Rcmdr from R.app, a terminal window, or
RStudio.
On the other hand, if you *have* installed XQuartz and rebooted, and the
problem still occurs, then see whether you can load and use the tcltk
package directly, without the Rcmdr; try, e.g. (from ?TkWidgets),

        library(tcltk)
        tt <- tktoplevel()
        label.widget <- tklabel(tt, text = "Hello, World!")
        button.widget <- tkbutton(tt, text = "Push",command =
function()cat("OW!\n"))
        tkpack(label.widget, button.widget)

Finally, your setup is very similar to mine -- that is, I haven't yet
upgraded my Mac to R 3.4.2 (which I don't think is built yet for macOS)
but all my R packages are up-to-date. An exception is that I haven't yet
installed the latest version of Xcode, which I'll do now to see what
happens. It's unclear to me from your message whether the Rcmdr package
worked before you installed the newest Xcode.

I hope this helps,
John

--------------------------------------
John Fox, Professor Emeritus
McMaster University
Hamilton, Ontario, Canada
Web: socserv.mcmaster.ca/jfox



-----Original Message-----
From: R-SIG-Mac [mailto:r-sig-mac-boun...@r-project.org] On Behalf Of
Robert Baer
Sent: Saturday, September 23, 2017 10:25 AM
To: r-sig-mac@r-project.org
Subject: [R-SIG-Mac] Rcmdr start-up issue

I seem to be having a problem starting Rcmdr:

library(Rcmdr)
Loading required package: splines
Loading required package: RcmdrMisc
Loading required package: car
Loading required package: sandwich
Loading required package: effects
Loading required package: carData

Attaching package: ‘carData’

The following objects are masked from ‘package:car’:

     Guyer, UN, Vocab

lattice theme set by effectsTheme()
See ?effectsTheme for details.
Error: package or namespace load failed for ‘Rcmdr’:
  package ‘tcltk’ does not have a namespace
I tried first from within RStudio, then from R itself. Same outcome.
Reinstalling Rcmdr, tcltk or tcltk2 package did not seem to help.

I’m brand new to mac, so I may be missing something basic.  On the other
hand I should confess to just having just “updated” Xcode.

R.Version()
$platform
[1] "x86_64-apple-darwin15.6.0"

$arch
[1] "x86_64"

$os
[1] "darwin15.6.0"

$system
[1] "x86_64, darwin15.6.0"

$status
[1] ""

$major
[1] "3"

$minor
[1] "4.1"

$year
[1] "2017"

$month
[1] "06"

$day
[1] "30"

$`svn rev`
[1] "72865"

$language
[1] "R"

$version.string
[1] "R version 3.4.1 (2017-06-30)"

$nickname
[1] "Single Candle"


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--
Robert W. Baer, Ph.D.
Professor of Physiology
Kirksville College of Osteopathic Medicine
A T Still University of Health Sciences
800 W. Jefferson St
Kirksville, MO 63501
660-626-2321 Department
660-626-2965 FAX

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