Yes, to a degree - but is'a bit counter-intuitive. Unfortunately, the 4.0 installer won't keep 3.6 (not sure why, need to investigate), but vice-versa. So you have to install 4.0.0 alpha and then 3.6.3. Alternatively, you can move /Library/Frameworks/R.framework aside and then install 4.0.0 alpha.
Once you have both versions, you can just change the Current symlink from one to the other - see R for Mac FAQ 10.10: https://cran.r-project.org/bin/macosx/RMacOSX-FAQ.html#Why-is-R_002ehome_0028_0029-not-versioned_003f Cheers, Simon > On 3/04/2020, at 10:12 AM, Spencer Graves <spencer.gra...@prodsyse.com> wrote: > > Is there a procedure for dual install, e.g., so I could run "R4 CMD > check", etc.? > > > Please excuse if this has already been answered. > > > Thanks, > Spencer Graves > > > On 2020-04-02 02:50, Rainer M Krug wrote: >> >>> On 1 Apr 2020, at 16:07, Patrick Schratz <patrick.schr...@gmail.com> wrote: >>> >>> The same goes here regarding support. >>> >>> I am (co-)maintaining a package on ropensci focusing on provider-agnostic >>> CI approaches for R (tic) and have quite some experience with all the >>> little culprits there. >>> >>> Since you mentioned Travis: Be aware that the R community is (slowly but >>> actively) moving away from Travis for a few reasons. >>> Also on GitHub Actions you can only build on 10.15 (Catalina) right now. >> So where is the R community moving too? >> >> Rainer >> >>> Best, Patrick >>> On 1. Apr 2020, 15:41 +0200, Bob Rudis <b...@rud.is>, wrote: >>>> I shall pile on with an additional offer of assistance, Simon and a huge >>>> #ty for this and all the work you do. >>>> >>>>> On Apr 1, 2020, at 09:30, Balamuta, James Joseph <balam...@illinois.edu> >>>>> wrote: >>>>> >>>>> Simon, >>>>> >>>>> Thanks for the overview! A few quick questions: >>>>> >>>>> 1. Compiler-wise, the external clang compiler requirement was removed >>>>> and, so, there is no guarantee of OpenMP on macOS again? >>>>> 2. Why was 10.13 chosen as the oldest system instead of 10.14 given the >>>>> new push for increased security by Apple? >>>>> 3. How likely is the oldest system requirement to be bumped in a patch >>>>> release? >>>>> >>>>> Also, if you need help with mac-builder, Travis, or GitHub Actions, I'm >>>>> more than happy to help! >>>>> >>>>> Best, >>>>> >>>>> JJB >>>>> >>>>> On 3/31/20, 11:59 PM, "R-SIG-Mac on behalf of Simon Urbanek" >>>>> <r-sig-mac-boun...@r-project.org on behalf of >>>>> simon.urba...@r-project.org> wrote: >>>>> >>>>> Dear Mac users, >>>>> >>>>> R 4.0.0 will be using an entirely new toolchain, entirely new build >>>>> system on entirely new macOS version and hardware. Therefore I would like >>>>> to ask you kindly to test the binaries from >>>>> >>>>> https://mac.R-project.org >>>>> >>>>> before the release as much as you can. Raising any issues after the >>>>> release is too late! So please, please, test the pre-releases. Report any >>>>> issues either directly to me or this mailing list. >>>>> >>>>> The nightly builds are signed, but not necessarily notarized. However, >>>>> the build fulfils Apple's conditions and is known to pass notarization >>>>> (in fact the the package available for download today is actually >>>>> notarized) so it should be a good test for the release which will be >>>>> notarized and should work on Catalina. >>>>> >>>>> For those that want to replicate our setup - technical details: we are >>>>> now building with macOS 10.13 (High Sierra) as target (i.e. the oldest >>>>> supported system), regular Apple Xcode/command line tools and GNU Fortran >>>>> 8.2. R builds are running on macOS 10.15 (Catalina) with Xcode 11.4 using >>>>> macOS 10.13 target. Packages are built on macOS 10.13 VMs with just Apple >>>>> command line tools (this should make it easy to replicate the setup using >>>>> Travis, for example). All 3rd party libraries that CRAN uses are >>>>> available in http://mac.r-project.org/libs-4/ >>>>> >>>>> The new R build system is in >>>>> https://svn.r-project.org/R-dev-web/trunk/QA/Simon/R4 >>>>> Packages build system has not changed and is in >>>>> https://svn.r-project.org/R-dev-web/trunk/QA/Simon/packages >>>>> >>>>> We also plan to have a mac-builder available with similar function as the >>>>> win-builder where pre-submission tests can be performed and potentially a >>>>> Travis template. >>>>> >>>>> Please test R pre-releases and provide feedback! >>>>> >>>>> Thanks, >>>>> Simon >>>>> >>>>> _______________________________________________ >>>>> R-SIG-Mac mailing list >>>>> R-SIG-Mac@r-project.org >>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac >>>>> >>>>> >>>>> _______________________________________________ >>>>> R-SIG-Mac mailing list >>>>> R-SIG-Mac@r-project.org >>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac >>>> _______________________________________________ >>>> R-SIG-Mac mailing list >>>> R-SIG-Mac@r-project.org >>>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac >>> [[alternative HTML version deleted]] >>> >>> _______________________________________________ >>> R-SIG-Mac mailing list >>> R-SIG-Mac@r-project.org >>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac >> -- >> Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, >> UCT), Dipl. Phys. (Germany) >> >> Orcid ID: 0000-0002-7490-0066 >> >> Department of Evolutionary Biology and Environmental Studies >> University of Zürich >> Office Y34-J-74 >> Winterthurerstrasse 190 >> 8075 Zürich >> Switzerland >> >> Office: +41 (0)44 635 47 64 >> Cell: +41 (0)78 630 66 57 >> email: rainer.k...@uzh.ch >> rai...@krugs.de >> Skype: RMkrug >> >> PGP: 0x0F52F982 >> >> >> >> >> [[alternative HTML version deleted]] >> >> _______________________________________________ >> R-SIG-Mac mailing list >> R-SIG-Mac@r-project.org >> https://stat.ethz.ch/mailman/listinfo/r-sig-mac > > _______________________________________________ > R-SIG-Mac mailing list > R-SIG-Mac@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-mac > _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-mac
