Allow from current website only - only cookies from the website you are currently visiting will be allowed in Safari; Allow from websites I visit - Safari will allow all cookies from the website you are visiting and only allow cookies from third-party sites if you have also specifically been to that website before.
If you let your web browser store cookies over a long period of time, a number of bad things can happen. A large collection of cookies can take up more hard drive space than you might think. Cookies eventually get out of date, so they're not only taking up drive space but also wasting it because they're no longer serving any purpose. Last but not least, cookies can become corrupt from Safari lockups, power outages, unplanned Mac shutdowns, and other events. Eventually, you're likely to find that Safari and some websites no longer work well together, or work together at all. Launch Safari and select Preferences from the Safari menu. In the window that opens, click the Privacy tab.
Near the top of the Privacy window, you'll seeĀ 'Cookies and other website data.' If you wish to remove all stored cookies, click the Remove All Website Data button. You'll be asked if you really want to delete all data that has been stored by websites. Click Remove Now to remove all cookies, or click Cancel if you've changed your mind. If you would like to remove specific cookies or find out which sites have been storing cookies on your Mac, click the Details button, just below the Remove All Website Data button. A window will open, listing all of the cookies that are stored on your Mac, in alphabetical order by domain name, such as Lifewire.com.
If it's a long list and you're looking for a specific site, you can use the search box to locate a cookie. This can be helpful when you're having problems with a specific website; deleting its cookie may set things right. To delete a cookie, select the website name from the list, and then click the Remove button.