Thanks for contacting Syncfusion support.
Please find the following responses for your queries.Q1)
Can i use my community license key with these downloads? A1)
Yes, you can use the community license key for the setups in the download link you have mentioned. Since, you have the community license, you can download the setups for the version you require from the Products and downloads
Which is the best download to use?A2)
You can download and install the latest 2016 Volume 3 Service Pack v220.127.116.11 from the following link.https://www.syncfusion.com/support/directtrac/downloads/14_3_0_52
Also, please refer the steps suggested in the following KB link to generate the Unlock key for respective versions.http://www.syncfusion.com/kb/2326 Q3)
Can i install syncfusion enterprise in windows and copy the needed dolls to my mac partition, then add them as references to my project?A3)
Yes, you can install in Windows OS, copy the required assemblies to the MAC machine and add them as reference in your projects.
As Syncfusion is providing separate installer for MAC machine, you can download and install the MAC installer from the above download link instead of copying the assemblies from Windows machine.
Also, we would like to let you know that we are providing the MAC installer for the following Syncfusion platforms.
2. ASP.NET Core
Can i submit apps developed with the community license to the app stores? Or do i need to buy a xamarin license.A4)
Yes, we can upload the app developed using Xamarin community license. But it has some limitations which can referred from the below link. https://developer.xamarin.com/guides/cross-platform/getting_started/license/