[problems in installing] no CMakeLists.txt

Hi,
if I downloaded .dmg file for OSX, do I have to download .tar file, too?
Below is the reason why I think this way.

I downloaded [root_v6.18.04.macosx64-10.14-clang100.dmg] on OS X 10.15 Catalina.

And as README_INSTALL txt says, typed
$mkdir
$cd
$cmake …/root
on terminal, but it says
CMake Error: The source directory “/Users/baghanna/Desktop/root_v6.18.04” does not appear to contain CMakeLists.txt.

So I founded that in my root_version folder, there was no CMakeList (but there was cmake.), no build folder… There were only 16 folders, less than those of tutorial Youtube’s.
Can I build without them? Or, should I re-download .tar file? Please save me

I solved it by
$git clone ~.

And now I am building it… Is it takes several days to install ROOT originally?

Sorry for the late reply.

You downloaded a binary; no need to run CMake afterwards: you will have ROOT in /Application/root-.../bin/!

Which documentation confused you on what to do after downloading the file? Could you share the url?

Cheers, Axel.