Problems with RStudio for mac

Thanks Bill for the recommendation.
I installed Positron but I got this message, it doesn't seem to connect
with R.

R 4.5.1 failed to start up (exit code -1)

The kernel exited before a connection could be established
dyld: Symbol not found:
__ZTTNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
Referenced from:

/Applications/Positron.app/Contents/Resources/app/extensions/positron-r/resources/ark/ark
Expected in: /usr/lib/libc++.1.dylib
in

/Applications/Positron.app/Contents/Resources/app/extensions/positron-r/resources/ark/ark

El mi?, 16 jul 2025 a las 7:14, <bill+rsigmac at 8pawexpress.com> escribi?:

I?m neither a Posit/RStudio employee/dev nor do I use their IDEs atm, but
? while RStudio IDE requires MacOS 13+, the ?next-gen? IDE from Posit is
Positron, and it allegedly depends only on MacOS 10.15+ with universal,
intel, and arm64 binaries. See https://positron.posit.co/download.html.

I?ve played briefly with it, and while I?m an avid emacs/ess user (never
been much for RStudio IDE itself), the Positron experience is getting

much

closer to what I hope for. There are discussions on migrating (keyboard
shortcuts, mental assumptions, etc) from RStudio IDE to reduce the

change,

and I believe there are few things one can do in RStudio that are not

also

feasible in Positron.

Good luck,
Bill

On 7/15/25 18:36, Simon Urbanek wrote:

Jos?,

I agree that latest RStudio dropping support for a very large number of

Macs is unfortunate. It may be worth raising it with Posit - we have very
deliberately not increased the macOS version requirement of R binaries,
because it would affect way too may R users based on the estimates from
weblogs (as Intel Mac owners simply cannot upgrade).

That said, in the meantime you can install any older R version as well -

see

https://cran.r-project.org/bin/macosx/big-sur-x86_64/base/

to match the last working RStudio to see if it will work for your use

case.

Of course, for regular work you can switch to the Mac GUI which always

supports the same macOS version as R, or any of the other GUI alternatives
that don?t embed R.

Cheers,
Simon




On 16/07/2025, at 02:37, Jos? Carlos Guerrero Ant?nez <

jcgantunez at gmail.com> <jcgantunez at gmail.com> wrote:

Thanks Kevin and Roy,
I work with two old Macs with the BigSur operating system (one at home

and

one at school) and I can't upgrade, which prevents me from having the
newest version of RStudio because it doesn't meet the requirements.
I wanted to install the caretSDM package, on the Mac at home I had

version

4.3.3 and the package recommended me to use a newer version of R and I
upgraded to version 4.5.1. In the case of the faculty Mac I am using
version R.4.4.0 and I have no problem with the caretSDM package.
From my ignorance I dare to say that there is a package that is

generating

the conflict with R version 4.5.1.

Best regards,

El mar, 15 jul 2025 a las 1:02, roy (<rollinforall at gmail.com> <

rollinforall at gmail.com>) escribi?:

Hi Jos?
fwiw, I tried R 4.5.1 on my macmini (15.5, Intel) with an old version of
RStudio and received the same similar error you reported.  When I updated
to the latest RStudio (Version 2025.05.1+513 (2025.05.1+513)) my quick

test

(matrix multiplication) worked without error.

cheers, roy


On Mon, Jul 14, 2025 at 8:42?PM Kevin Ushey <kevinushey at gmail.com> <

kevinushey at gmail.com> wrote:

Did you already try installing the latest available release of RStudio?

In

general, R and RStudio should be upgraded together.

If you still have problems with the latest release of RStudio, you should
file a big report at https://github.com/rstudio/rstudio/issues.

On Mon, Jul 14, 2025, 6:54?PM Jos? Carlos Guerrero Ant?nez <

jcgantunez at gmail.com> wrote:

Thank you Jeff for your suggestions, I will keep them in mind.




El lun, 14 jul 2025 a las 22:45, Jeff Newmiller (<

jdnewmil at dcn.davis.ca.us

)

escribi?:


R is maintained by the volunteer R Core group, while RStudio is

maintained

by Posit. You may get more thorough help with RStudio if you ask at

the

Posit forum.

That said, as a rule the RStudio team has to play "catch-up" when R is
upgraded by R Core. You may be running an older version of RStudio

that

does not know how to deal with R 4.5.1. Check for a newer version of
RStudio, or try uninstalling R 4.5.1 and re-installing an older

version

R... or try using R with a different text editor (there are a lot of

them).

RStudio is a fine option, but it is not the only way to use R.

On July 14, 2025 5:54:47 PM PDT, "Jos? Carlos Guerrero Ant?nez" <

jcgantunez at gmail.com> wrote:

Hi,

I am not sure if this is the right forum for this query, and I

apologize

in

advance.
I recently upgraded to version R 4.5.1, and I use the RStudio

program. I

can open it without any problem, but I am experiencing crashes

whenever

I

perform any action in the program. I receive the following message:
"R Session Aborted. R encountered a fatal error. The session was
terminated. Start New Session."

Could you please recommend what I should do?

Thank you very much

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