Apple - What is the OSX equivalent to Window's AppData folder?

This kind of data is frequently stored in ~/Library/Application Support.

User-specific settings are frequently stored in ~/Library/Preferences

Your Chrome profile is located at ~/Library/Application Support/Google/Chrome/Default.

I recommend going on a little exploration of the ~/Library folder; there's a lot of useful stuff in there.

I had this happen and I fixed the problem by relogging in to Google Sync.

The profile file is stored in:

~/Library/Application Support/Google/Chrome/Default

Usually an application will install data in /Library/Preferences/ and/or ~/Library/Preferences/.

Data can also be placed after any of the following patterns:

/Library/Preferences/<application name>/

~/Library/Preferences/<application name>/

/Library/Application Support/<application name>/

~/Library/Application Support/<application name>/͏͏͏͏

/Library/<application name>/

~/Library/<application name>/ ͏͏͏͏