[R-SIG-Mac] macos 26 considerations

[Gábor Csárdi]

I am 26.2 and everything works fine, no need to reinstall anything,
except maybe xquartz, which sometimes needs a reinstall after an
update. But xquartz works fine as well.

Gabor

On Sun, Feb 22, 2026 at 4:40 PM Bill Evans via R-SIG-Mac
<r-sig-mac using r-project.org> wrote:
>
> I’ve been holding off upgrading to MacOS 26 for many reasons, most
> related to yet-unsubstantiated concerns about R. Because it’s a new ABI,
> I suspect the process would be similar to a major/minor release in R:
> update the compile chain then re-install all packages. Is there a strong
> recommendation for or against this upgrade? Are there safe or at least
> less-risky pathways for upgrading the OS? Is R-devel regularly tested
> against 26? Are there known unresolved problems, such as “package xyz
> does not currently work”?
>
> FTR: I’m currently on macos 15.7.4 using R-4.5.2, and there is nothing
> inherently broken. I don’t have a /need/ to upgrade to 26 atm but fear
> at some point that some tool I use (be it Parallels or something else)
> may eventually require 26 for some or all of the desired functionality.
> I’m just planning ahead (and holding back two colleagues, also on
> macos-15.7).
>
> Thank you!
> Bill
>
> ​
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