Problems in installing PortfolioAnalytics

Hi everyone,

I am trying to install the R package [PortfolioAnalytics](https://github.com/braverock/PortfolioAnalytics?utm_source=chatgpt.com)
on macOS (Apple Silicon), but I cannot get it to install successfully because of dependency issues related to Rsymphony / ROI.plugin.symphony.

I am not an expert in R package installation or system dependencies, so apologies if this has already been solved in another discussion.

> version
_
platform aarch64-apple-darwin25.4.0
arch aarch64
os darwin25.4.0
system aarch64, darwin25.4.0
status
major 4
minor 6.0
year 2026
month 04
day 24
svn rev 89956
language R
version.string R version 4.6.0 (2026-04-24)
nickname Because it was There

What I tried

I tried several approaches:

Installing directly from CRAN:

Installing from GitHub
Downloading the .tgz manually and installing locally
Installing dependencies through Homebrew
Trying to manually install Rsymphony
Installing symphony through brew and pointing include/lib paths manually

If anyone has suggestions for installing PortfolioAnalytics on Apple Silicon + R 4.6, I would really appreciate the help.

Thank you very much.