Eberhard, Thanks - I'm also  an RStudio user, but am trying to use Rcmdr as a 
gentle introduction to R for a course (building up to RStudio use later).

John, thanks also for responding (not at all an Rcmdr issue, I think - that's 
just what happened to show the problem). Tech details:

MacBook Pro 15 (bought 2019)
Catalina 10.15.4
2.6 GHz 6-core Intel Core i7
16 GB 2400 MHz DDR4 memory
Radeon Pro 555X 4GB & Intel UHD Graphics 360 1536MB graphics.

R 3.6.3, new download of Rcmdr etc (reinstalled everything from scratch before 
realising X11 was the reason Rcmdr wasn't working and downloading XQuartz). I'm 
almost certain I would have rebooted before trying to run this - I saw that 
warning somewhere (CRAN FAQ maybe?). I certainly have since, but perhaps that's 
why it is now appearing to function correctly? I should say that 2-3 students 
have reported the same problem over the last 3-4 days, so it isn't just me.

Thanks again for input. Best wishes to all on the list.

Niall

________________________________
 
Dr Niall H. Anderson | Senior Lecturer in Medical Statistics/ Programme 
Co-director, MPH (on campus)
Room G113B, Doorway 1
Usher Institute, University of Edinburgh
Old Medical School, Teviot Place, Edinburgh, EH8 9AG
 
niall.ander...@ed.ac.uk  | +44 (0)131 650 3212 | Skype = live:niall.h.anderson
 
Responses to emails are only expected during your working hours

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On 21/04/2020, 04:55, "Fox, John" <j...@mcmaster.ca> wrote:

    Dear Niall,
    
    > On Apr 20, 2020, at 3:42 PM, ANDERSON Niall <niall.ander...@ed.ac.uk> 
wrote:
    > 
    > Dear all,
    >  
    > I’m relatively new to MacOS and have only recently started trying to use 
XQuartz to enable me to run Rcmdr. Are there any common issues/ tips for 
getting good performance out of it (or should it usually run well with default 
settings)?
    >  
    > On first installation, I found there was a very long lag in menus being 
populated (i.e. the menu shape was generated, but no usable options were 
added), to the extent that Rcmdr was then effectively useless (not Rcmdr’s 
fault, I don’t think). One of my students suggested reducing Output Colors 
option from the default “Millions” setting. That seems to deal with the 
problem, thankfully.
    >  
    > Is that typical of XQuartz, and is there anything else I should be doing 
to get the best performance from it?
    
    I haven't observed the problem you describe on my Mac, which is a three- or 
four-year-old MacBook Pro (that is, the Rcmdr dialogs display reasonably 
crisply for me), and I haven't done anything special to configure XQuartz. Here 
are the specs for my Mac:
    
     Model Name:        MacBook Pro
      Model Identifier: MacBookPro13,2
      Processor Name:   Dual-Core Intel Core i7
      Processor Speed:  3.3 GHz
      Number of Processors:     1
      Total Number of Cores:    2
      L2 Cache (per Core):      256 KB
      L3 Cache: 4 MB
      Hyper-Threading Technology:       Enabled
      Memory:   8 GB
     
    It might help to have some more information. I assume that you're using the 
most recent versions of R, the Rcmdr package, and other packages, and a recent 
version of macOS. What Mac do you have, and did you reboot it after installing 
XQuartz? If you updated R, did you reinstall XQuartz?
    
    Best,
     John
    
      -----------------------------
      John Fox, Professor Emeritus
      McMaster University
      Hamilton, Ontario, Canada
      Web: http::/socserv.mcmaster.ca/jfox
    
    >  
    > Thanks,
    >  
    > Niall Anderson
    >  
    >  
    > ________________________________
    >  
    > Dr Niall H. Anderson | Senior Lecturer in Medical Statistics/ Programme 
Co-director, MPH (on campus)
    > 
    > Room G113B, Doorway 1
    > Usher Institute, University of Edinburgh
    > Old Medical School, Teviot Place, Edinburgh, EH8 9AG
    >  
    > niall.ander...@ed.ac.uk  | +44 (0)131 650 3212 | Skype = 
live:niall.h.anderson
    >  
    > Responses to emails are only expected during your working hours
    > <image001.png>
    > www.ed.ac.uk/usher | @EdinUniUsher
    >  
    > <image002.png>
    >  
    >  
    > The University of Edinburgh is a charitable body, registered in Scotland, 
with registration number SC005336. 
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