[R-SIG-Mac] several parallel R versions, pkgutil --

[Christian Hoffmann]

How can I install and use parallel R versions? In the install process, 
there is step 2 where I can see the suggestion of executing

pkgutil --forget org.r-project.R.x86_64.fw.pkg

which I execute in the terminal literally.

But this procedure does not prevent the new version from eliminating the 
old version.

What am I missing?
TIA  C.

-- 
Christian W. Hoffmann
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