> On Jun 29, 2016, at 4:31 AM, [email protected] wrote:
> 
>> On Jun 27, 2016, at 4:47 PM, Simon Urbanek <[email protected]> 
>> wrote:
>> 
>>> On Jun 26, 2016, at 5:40 PM, Carl Witthoft <[email protected]> wrote:
>>> 
>>> Hi.
>>> I D/L'd the 3.3.1 version of R for MacOSX and ran the installer. After 
>>> getting some "can't load" error messages, I discovered that the installer 
>>> had updated the MicrosoftROpen.app, not the "vanilla"  R.app . Is this 
>>> expected behavior, or am I making a hash of my apps and libraries by trying 
>>> to keep both R and MRO available on my (Yosemite) machine?
>> 
>> I don't know about MRO (sounds somewhat paradoxical ;)), but Apple Installer 
>> simply upgrades the application on your machine no matter where you moved it 
>> (whether you like it or not). If it really did upgrade your MRO app then it 
>> means Microsoft doesn't even bother changing the ID of the app which means 
>> they still claim it's our CRAN R which sounds really wrong given the name...
> 
> When you look at the MRO installation of R, the MRO.app looks just like
> your (and Stephan Iacus and the other contributors) R.app at least to my
> intermediate-level understanding of how to measure similarity. It
> includes citation of authorship but they did change the names of icons.
> The TO-DO list is identical. The png ions for history, prefs, quit, the
> NEWS text file, and many other items in the package contents are the
> same. This is a side by sided display of the Package Contents (converted
> to pdf):
> 
> It would be no surprise if two installations of the same version
> conflicted since they are using the same names for many modules and
> because Revo/MS says they will conflict, unless that is ... they were in
> different directories in the R.Framework tree, which is often the case
> with the MRO releases, since they generally lag behind by one major
> version level. My MRO version 3.2.2 has been working well alongside R
> version 3.3.0 and now 3.3.1. RSwitch.app seems to "switch" everything
> that is needful. 
> 
> -- 
> 
> The funny thing is that I ran the package installer for R 3.3.1 and it
> installed it into the MRO package folder.   If I dbl-click the MRO
> package icon, I get, so far as I can tell, the R3.3.1 engine and the
> usual packages, but  don't know how to tell whether I've simply
> clobbered MRO into nonexistence.
> 

Yes, Apple Installer will upgrade the app wherever it is. Since MS doesn't 
change the ID it pretends to be CRAN R.app so as far as OS X goes they are 
indistinguishable. Only MS can fix that problem by not re-using our ID for 
their binaries... I suspect that the same may be true for the framework (i.e. 
they may be using R Foundation ID there as well), but I didn't check.

Cheers,
Simon

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