Zoho calendar with my gmail email address and responses

Zoho calendar with my gmail email address and responses

I want to use the zoho calendar with my gmail email address.
By clients I use Mail App and Calendar App in Mac OS.
The problem I have is that the appointments created from Calendar App in Zoho Calendar that have invitations receive the answers by the gmail account (that I consult with Mail App) but the appointments are not updated with Accept or rejections.
Thanks 
Carlos