Your subject line is alarmist -- you only provide any evidence for 1 out of > 19000 CRAN packages (and not R itself).

Package RGtk2 was archived in 2021. The current rattle (5.5.1) does not depend on it. A direct download is available from rattle's CRAN landing page. You have not told us what version of rattle you downloaded nor from where.

For me just now R 4.2.2 successfully downloaded

trying URL 'https://cran.wu.ac.at/bin/macosx/big-sur-arm64/contrib/4.2/rattle_5.5.1.tgz'

On 27/02/2023 04:32, Keith Bierman wrote:
I've tried several (4.2 branches.pkg, R-GUI8191 dmg .... R installs fine,
but attempts to the load rattle fail. If I missed some obvious
configuration switch, feel free to point me at the FM! ;>
Seems to me that the downloads marked arm64 should only suck in
arm64-compatible dependencies..

. library(rattle)
Loading required package: tibble
Loading required package: bitops
Rattle: A free graphical interface for data science with R.
Version 5.5.1 Copyright (c) 2006-2021 Togaware Pty Ltd.
Type 'rattle()' to shake, rattle, and roll your data.
rattle()
Loading required package: RGtk2
Error in library.dynam("RGtk2", pkgname, libname) :
   shared object ‘RGtk2.so’ not found
Authorization required, but no authorization protocol specified

Need GTK+ ? (Restart R after installing)

1: Install GTK+
2: Do not install GTK+

Selection: 1
trying URL 'http://r.research.att.com/libs/GTK_2.24.17-X11.pkg'''

Which consistently seems to load the *INTEL* version of GTK, so of course
it installs, but fails to run, and tries to install again. Loop forever.

From the installer:

Requirements:

- Mac OS X 10.6 (Leopard) or higher, Intel 64-bit Mac


I*t supports Intel 64-bit Macs only.* All files will be installed in

*/Library/Frameworks/GTK+.framework/Versions/2.24.X11*

Keith Bierman
khb...@gmail.com
303 997 2749 <http://voice.google.com/calls?a=nc,%2B13039972749>

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Brian D. Ripley,                  rip...@stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford

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