Drawing an event with root while using iTerm2 on macbook does not produce pop-up graphics

Newbie
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1

Hello,

I am new to root, c++, all of it - sorry if something is obvious.

I needed to double check a particular event in my tree. I did the following in my terminal (iTerm2 running on macOS Monterrey):

root -l root://cms-xrd-global.cer.ch//store/.....targetfile.root
root [0]
Attaching file root://.......targetfile.root as _file0...
(TFile *) 0x329a9f0
root [1] _file0->ls()
  KEY: TTree        Events;1       Events
  (.................)
  (.................)
root [2] Events->Draw("Pileup_nTrueInt")
Info in <TCanvas::MakeDefCanvas>: created default TCanvas with name c1
root [3]

Although the output suggests that the canvas was created and the contents of that tree are there, there was NO popup showing me the canvas. Probably has to do with my laptop’s or terminal’s settings… any wisdom as to how to make it pop up?

ROOT Version: 6.24/07
I am ssh’d into CMS EL8 interactive cluster, I think root was already here. I did not install it myself.

2

Hi,

Thanks for posting and welcome to the ROOT Community!

How did you ssh to the machine? Can you try logging in with ssh -XY myusername@mymachine?

Cheers,
D