Why is there a huge increase in cookie placement after upgrade to Safari 9.0?

You're not alone. Others that have upgraded to Safari 9 are experiencing the same cookie problems.

From your Safari menu bar click Safari > Preferences then select the Privacy tab then click: Remove All Website Data

Then monitor cookies. If that didn't help, please provide feedback to Apple > Apple - Safari - Feedback

You won't receive a reply but the more Safari users that send feedback, the sooner a fix.

Let's hope!

I just noticed the same thing today! I was afraid I obtained some sort of adware or malware. I am a little relieved to know that there are others who have this issue. I clear my cookies and history....then restart safari and I immediately have 33 cookies!

Im still not sure I want to log into any accounts for fear of password being compromised. But I guess since this is a Safari 9 upgrade issue. It is not.

I have been having this problem also, and am relieved to see it is not just me. The Privacy settings of 'Remove all website data' and 'Always block' seem to not work at all. I usually leave cookies of 7 or so sites, and I clear all others daily. in checking a couple of days ago I had almost 300 sites storing junk. I delete all, and dozens come right back, even if I click on 'Always block'. I even went through the steps to locate and remove adware and such, but found none. I am concerned with the security of Safari 9.0. I also sent the information to feedback.

I've been dealing with this same problem for the last few days. I'm sure that Apple is aware of the problem and will eventually get it fixed. In the meantime, you can try this: Go to Safari / Preferences / Advanced. At the bottom, you will see a checkbox that says Show Develop Menu in menu bar. Click on the checkbox. Develop should now be on your Safari menu bar, between bookmarks and window. Go to Develop / Empty Caches. Most of the stuff that's been showing up in my website data box are caches, and it cleans them out in one shot. Unfortunately, you'll have to do this after every session until they fix the problem, but it beats trying to get rid of them individually. One other thing - Does this problem only affect those who have NOT upgraded to Capitan? I haven't upgraded yet, and I'm not aware of anybody that has upgraded having this problem. Just curious. Good luck!

I'm having this problem as well and have sent feedback to Apple. I'm using the Develop workaround. At the start of a Safari session I immediately click on Empty Caches AND also check Disable Caches. So far, so good, but it's kind of a pain in the neck since you have to do it every time you start Safari.

Have the same problem on both my Mac Pro (late 2013) and my Macbook Pro. I am now reduced to forever clearing these out each time I use Safari. I have not upgraded the OS X to EL so still on Yosemite but did upgrade Safari which is now Version 9.0 (10601.1.56.2). Have sent Bug report to Apple as suggested by CS

So, I upgraded to El Capitan this afternoon (side note: update went very smoothly and quickly.....about 35 mins total). Safari still has the same issue with loading dozens and dozen of files/cookies in my cache. So frustrating. I feel so unsafe browsing and logging into website (i.e. pay bills).

El Capitan 10.11

Safari 9.0 (11601.1.56)

I spoke to Apple Tech Support this morning about 'magic cookies' appearing with 10.10.5 and Safari 9.0 even with Always Block setting. Conversation went from 1st tech to senior advisor to managers to sending report to Engineering. I was assured that this problem does not exist with El Capitan but I obviously defer to any actual user who has El Capitan actually installed.

I never upgrade to any system OS unless it reaches xx.2 so hopefully this issue will be fixed by then. In the meantime, I keep the Safari Preferences window open at all times and periodically delete cookies. I have never seen so many cookies ever!

I have already sent a Feedback request.

Very strange answers you had from Apple staff when you consider that in App Store Updates we were advised "The safari update is recommended for all OS X Yosemite users and contains improvements to privacy, compatibility, and security ...."

Even stranger today.

I was advised by another senior tech that Safari evolves and changes and that "Always Block" refers to malware and bad cookies. Websites need cookies to function and that is why I see so many.

I pointed out that all these cookies are because of 9.0 and "Always Block" previous to this update meant what it said. If a site needed cookies to function, it would let you know. I also pointed out that many people are upset by this issue. Besides, 'double-click.net' which shows up all the time now, is not a 'good cookie'.

Keep the feedback coming and if enough complain, the cookie issue will be resolved.

Is there a way to manually clear out some cookies, leaving others behind? When I go to my Safari Preferences, then the Privacy tab, I don't see an option to leave some cookies (such as the ones for YouTube), while deleting all the rest. All I get is the "Remove All Website Data" button. In 8.0, I remembered there being an option for that.