since newest rstudio update ggplot : The downloaded source packages are in ‘/private/var/.../downloaded_packages’ >

Hi @sklinger! Welcome!

That message on its own is not an error — R is just telling you the temporary location where it downloaded the package files it tried to install. The important part is actually everything before that line.

Here are the two things that are most helpful to provide when asking questions about package installation problems:

  1. All the console output you see when you try to install the package
  2. The output of running sessionInfo()

Here is how you should provide that information:

  1. In a new post on a blank line, click the little </> button at the top of the posting box. This will insert a small template with the words “type or paste code here” selected.
  2. Copy the output from the console (no screenshots please!)
  3. Paste the output here, replacing the “type or paste code here” line in the template,

Following these steps makes it easier for helpers to read what you post and keeps the forum software from garbling it :grin:.

I'm glad you are trying to understand how it all works! In the long run, that will make you a more confident R user. You might want to read this: Differentiating R from RStudio. Under normal circumstances, package installation doesn't have anything to do with your version of RStudio, but it can have a lot to do with your version of R.

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