Mac系统R 3.5版本无法安装OpenMx包问题求助

Hey there, let's work through this OpenMx installation issue on your Mac running R 3.5 step by step!

First: Resolve the xcrun Error #

You already nailed the first critical fix for that initial xcrun: error: invalid active developer path message — missing Xcode Command Line Tools are a super common culprit for R package installs on Mac. Running this in Terminal is exactly the right first move:

xcode-select --install

Just follow the pop-up prompts to complete the installation, then restart your R session before trying to install OpenMx again.

If It Still Fails After Installing Command Line Tools #

Since you mentioned issues persist post-install, here are the most common fixes tailored to R 3.5 and Mac:

• Match OpenMx version to R 3.5: Newer OpenMx releases drop support for older R versions. For R 3.5, you’ll need an older, compatible build of OpenMx. Try specifying the version directly when installing:

  install.packages("OpenMx", version = "2.15.6") # This version is verified to work with R 3.5
  

• Reset Xcode Command Line Tools path: Sometimes the tool path gets misconfigured even after installation. Run this in Terminal to reset it:

  sudo xcode-select --reset
  

  Restart both your Terminal and R session afterward, then retry the install.
• Disable OpenMP during source installation: OpenMP (a parallel processing library) can cause conflicts on older Mac/R combinations. If binary installation fails, try installing from source with this flag to bypass OpenMP checks:

  install.packages("OpenMx", type = "source", configure.args = "--disable-openmp")
  

• Check system library dependencies: OpenMx relies on low-level libraries like BLAS/LAPACK. Ensure your macOS is up to date, and that the full Xcode Command Line Tools (not just a partial install) are active. You can verify this by running xcode-select -p in Terminal — it should return /Library/Developer/CommandLineTools.

Quick reminder: Always restart R after making system-level changes (like installing Command Line Tools) — R doesn’t automatically pick up new system configurations mid-session.

内容的提问来源于stack exchange，提问作者Scott