which should be ~/Library/Application Support/Bitcoin
Unfortunately there is no such folder in Application Support named Bitcoin.
Now what to do?
Well that is a problem. That is the default data directory for Bitcoin, and when it first runs, it should make the folder there. However, because Bitcoin Core did run, that means that the data is going elsewhere.
Since you mentioned that the wallet.dat file was on your desktop, do you also see any folders named "blocks" "database" or "chainstate" on the desktop? Any files named peers.dat, banlist.dat, or debug.log? It may be possible that the desktop somehow became Bitcoin Core's data directory.
Concerning posting the log file data here, I don't know what private data it holds, so i don't wanna put it online.
What to me looks like abracadabra could hold vital info.
I guarantee you that the debug.log file contains absolutely no information that puts any of your Bitcoin at risk. It is intentionally designed to be shared with others in order to diagnose issues. The only "vital information" are the paths to the data directory and the wallet, which is what we are looking for right now. If you don't feel comfortable posting them publicly, feel free to PM me the file.
No way I can reconnect the .dat wallet file back to the correct place on my mac?
The issue is that we cannot do so without knowing the data directory. Right now the only way (that I can think of) to find the data directory is to use the debug.log file.