Hi Lydia,

If JDK8 is correctly installed, then you may just need to check if Icy is allowed to run on your MAX :

Did you tried this (taken from the FAQ) ?

<<
I installed Icy on my mac but it doesn’t work. How to fix it ?

First, you need to have java installed on your system (refer to the first FAQ entry to get the instructions).
Then the first time you try to launch the application it may not work because of the default Security preferences.
You can force execution by doing right click on the application icon (or Ctrl+click) and use the Open command, then confirm the operation. You should now be able to use Icy normally ?
>>

Best,

– Stephane