Apple doesn't look into anything here, you need to go https://www.apple.com/feedback/ and post your question but I can almost assure you it's a Citrix issue as far as Apple is concerned if anything changed from 10.2 to 10.3 to prevent Citrix from functioning and it's up to Citrix to fix. Unless Apple broke something that is included with their update exclusively don't expect them to look into it.
Removing legacy Citrix account. If this is the first time you have set up Citrix Workspace app, you do not have to do this. If you have previously used the Citrix Receiver or Citrix Workspace app on the device you are setting up, you will have two accounts listed in Citrix.You need to remove the old account. Mar 20, 2014 This video is about how to install the Citrix Receiver for Mac. This will allow you access to your H drive and SMART Notebook at home!
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can you ask your IT team if they see your account trying to authenticate into the gateway?
Citrix Workspace For Mac
please post your log from Os versions for mac book pro yosemite.
~/Library/Logs/com.citrix.AuthManager.log
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