Concrete 5.4 contains improvements to the way that caching is handled, but on some sites or servers, there may be a significant delay on each initial page load. Once it's been visited once, however, it'll pull from cache, and you'll enjoy the performance boost that comes from the latest cache architecture.

First, make sure that your server's timeout is correctly set. I had experience with a server that was timing out PHP before it had finished fully caching each page, so you might need to boost it to 60 or more seconds for complex or large sites (or slow servers!).

I haven't looked for an OS X app for this, though I'm sure one might exist. I used "Xenu's Link Sleuth", which worked very well.

http://home.snafu.de/tilman/xenulink.html...

Download and install the program. Open it up and go to File > Check URL and enter the URL for your site. Uncheck the box that says "Check external links". Click OK, and it will crawl through your site, page by page, prompting the server to generate the entire site cache.

This tool is also helpful for making sure that you don't have any broken links. You should be able to see the title of each page in your site as it loads each one, but it may report "site timeout" if your server is improperly configured. Everything works great on my shared hosting, but I had problems with this for a client who ran their own server, and still haven't worked out some kinks.

Hope this helps someone!