Solved! Go to Solution.
See attached screenshot (first one below). I see ArcGIS.framework there but not samples. Under ArcGIS.framework there are 3 aliases but they are all "broken" - double-clicking on one gives error "The operation can't be completed because the original item for 'ArcGIS' can't be found."
Note: I am still somewhat new to macs, and am not totally clear on the relationship between these folders (i.e., /Library vs. ${HOME}/Library)
See attached screenshot (second one below) - another mac/Xcode detail I am a little unclear on. The value /Users/myuserid/Library/SDKs/** is what displays on the Build Settings page, but if you double-click to edit it shows value $HOME/Library/SDKs. I assume this is OK/correct - just slightly confusing why it shows two different ways.
v2.2.1
This update contains a minor fix to the SDK installation package. The installer was unnecessarily laying down files related to legacy XCode Project Templates. These templates were deprecated and removed back at v2.1. In majority of the cases, the template files did not cause any harm. However, in exceptional cases, users were not able to install v2.2 due to permission issues related to where the files were being written. The v2.2.1 installer does not lay down these files.