Lightroom Grey bar issue

[melissag56352980]

For some reason, my LIghtroom window has this grey bar with  camera data in it. I can't figure out how to remove it. Please advise!

[Rikk Flohr: Photography]

[ I ]  KBSC for showing Information. Note: this is a 3-position toggle. 

[AxelMatt]

Press command + I to toggle the viewing of the camera infos

[GoldingD]

Looking at the authors attached screenshot, I notice the following (annotated by me):

Is this not a possible corrupt preference file issue?

/Followup/ Yes, hat tip to Per Berntsen. An old LrC version.

So what LrC version, what MACOS version?

[Per Berntsen]

The gray background (which is supposed to be transparent) typically appears when using an older version of LR on an unsupported Mac OS.

The small part of the toolbar visible in the screenshot also indicates that this is an older version.