What does apple have anything to do with cloud?
Apple has over a billion active devices out there which require frequent software updates, downloads for over 130 billion apps, massive music and video sales and streaming as well as information and document backup and sharing, They have a significant private cloud infrastructure sitting behind iTunes, iCloud, the App Store and Siri, not to mention iMessage, Face Time and a large number of other apps. Over the years they've also leveraged companies like Akamai and Google to provide some of these capabilities.
That said, I'm seeing recent Mac-only quarterly revenue of $7.24B compared to Cisco total quarterly revenues in the $11B range, and even with Macs generating far more than half the revenue all of Cisco generates it's too piddly to bother maintaining and Apple has all but abandoned them. I can't see why they'd bother with the rounding error that is UCS even for internal use only.