If you are looking for old Compressor releases, they will be here.
Some of these may be cracked versions, so use at your own risk. You
will be the only responsible if something goes wrong. I installed it
on my Mac and it does seem to behave normally.
Compressor (stand-alone) is now 10 years old, being released in 2011,
so I think that some versions can be considered abandoned.
The only Compressor version I have right now is 4.0.7, which is the
last version compatible with Mountain Lion and prior versions.
* DL #1 : Compressor 4.0.7 (March 28, 2013?)
Related : [Final Cut Pro X][1], [Motion][2]
Compatibility
Architecture: x86 (Intel:Mac)
I could not find compatibility info about Compressor 4.0.7
I can tell you that it works on my MacBook Pro 15" mid-2012 on OS X
Lion 10.7.5
[1]:
https://macintoshgarden.org/apps/final-cut-pro-x
[2]:
https://macintoshgarden.org/apps/motion