If you want to have the complete updated version for Mac, you just need to download the 21041 pc version, unzip it rename the www folder inside it as app.nw, drag it in the Resources sub-folder of your Mac TGO game after you will remove the old app.nw folder from it
From that point to update it you just need to download only the update patch and extract the www folder rename it app.nw drag it on the Resources sub-folder ( holding the alt key) release on it and click merge on the pop up window.
You will have the makeshift updated Mac version.