Compatibility:
The client could not run natively on Intel Macintosh machines. This version of the client supports Intel Macintoshes only; PowerPC Macintoshes are not supported.
Clipboard:
It was impossible to cut and paste data to and from Presentation Server for UNIX ICA sessions

SecureICA:
The SecureICA encryption service is no longer supported. We recommend using SSL instead.
Printing:
Only printing using PostScript is supported. Printing using PCL4 and PCL5 is no longer supported. See the Client for Macintosh Administrator’s Guide, Version 7.1 for more information on printing.
Client Auto Update:
The server can no longer update the client automatically by pushing newer versions of the client software to the client device.