Yes. But you’ve given us no information to guide you with?
Did you subscribe or buy a license to CS6? Mac? Windows? Which version?
And finally, what does can’t install mean?
Mac, previous use via Adobe Cloud, trial version, no CS6 previously installed.
When I tried to install the same app on laptop (again, no previous
CS6), note was that my installation on the other device will be removed?
iMac, MacBook Air, both on Yosemite.
Is there a 3rd computer with an install? If you try to install on a third machine the other two get deactivated. You should be able to allow the deactivation when you install on the MacBook then log in on the iMac to reactivate.