Can download particular application on Macbook but not Imac
I am trying to download an application on to my home computers, It is software that my company has created and is not Apple Authorised program at the moment, that is pending.
On my 2015 Macbook Mojave it is no issue, downloads Application and .zip, I can create an exception and voila, it downloads.
On my 2012 iMac Catalina, it downloads just the straight up App, no .zip appears anywhere and when I click on the App it just gives me ' Application (name of software) Can not be opened'
Any ideas?