Transmission

I downloaded Transmission 1.54 OSX.4.11

It will not launch. I placed the app in the applications folder,
placed icon in the dock,
clicked, but it won't open. There are no error messages.
Can anyone suggest how I pursue this ?
I have no tech savvy with software problems and I am groveling for ...

Hello community.

I downloaded Transmission 1.71 for OS X.4.11,
and ran it for 5 days, smoothly.
Today, Transmission won't launch, instead,
Today, the software declares, this version cannot run
on this OS.

I downloaded 3 previous OSX.4 versions from OLD APPS website,
none of them will launch, they ...