Well, i use Safari too, I've not had that message, but for the Mac OS's own internet browser, I find Safari flaky, it doesn't work well with some internet sites, and it regularly overburdens my 8gb RAM even with only a few pages open and getting the spinning wheel of death, have to force quit. . I still use it, as I am used to it. and can't be bothered to learn a new browser, but Apple really needs to up its game with its Safari browser.