I have absolutely no experience with iBuntu.
I just thought that it may be a handy alternative for those just wanted to have a macOS look on their Linux.
As @Aravisian pointed out already your machine is not particularly Linux friendly because:
- 32bit EFI + 64bit CPU*
- 2GB RAM**
*this would call for a specific distro comes with 32bit EFI or modding an installer with isorespin.sh (which works only for certain Ubuntu based distros).
**2GB would be insufficient to run Zorin OS with Gnome desktop (Core/Ultimate versions). Your best bet is Zorin Lite with XFCE desktop but I am not so sure if that is the "Zorin look" you wanted to have.
[edit]
I just realized that since you have to respin your installer, there is zero chance to be able to install Zorin on your system. Sorry.