Thank you so much for your patience! I already did everything you adviced and it worked in each website I browsed. Their system ran smoothly...except for the Bloomingdale's website!!! Still, each time I click on an item either to buy it or to look at the details, it gets me to the same annoying screen...400 Error...Do you think it might have something to do with their website? Because I already deleted all my caches and emptied my trash! I can't find anything else I should delete!
Progress is good.
I just navigated to Bloomingdale's and had no problem at the site. The next thing you can try is to flush your DNS cache. There are good, basic explanations of what DNS is, here (don't use the listed commands to flush, as they're dated) :
https://www.lifewire.com/what-is-dns-2483184
To flush, also called clear --
First, you should already be regularly backing up (and cloning) your machine as a standard operating procedure. Prior to doing some maintenance, or something out of the ordinary, is an especially good time to do a backup.
On to the flush --
You'll be using the CLI (command line interface) in Terminal. If you're not sure how to open it, see here :
https://www.techwalla.com/articles/how-to-open-terminal-on-a-macbook
Notice the article says to be cautious in Terminal. Yes, disasters can happen, but if you're careful with what you do
-- in example, if you don't know what a command means, don't just copy and paste off of any old site from someone you don't know without elsewhere verifying that command, maintain proper spacing and syntax within the command, etc...
-- it's an excellent tool in your toolbox.
Copy (triple click) the following in the Code Box and paste into Terminal (
or type into Terminal
exactly, from the s in sudo to the d in flushed; include all spaces in between):
Code:
sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder; say DNS cache flushed
Press return (or enter); you'll be asked to enter an admin password. Type it in (you won't see the characters on the screen) and press return again. The last part of the command, "say DNS cache flushed", will execute an audio action to your speakers. Quit Terminal.
The above command is for Yosemite version 10.10.4 and up, El Capitan and Sierra. If you have an earlier OS version the command would be different; see here :
https://www.igeeksblog.com/how-to-flush-dns-in-mac-os-x/
Before testing at Bloomingdale's, redo what you did in Safari as in
post #5, plan A and B.
Other references to the commands in the code box :
http://osxdaily.com/2015/11/16/howto-flush-dns-cache-os-x-elcap/
http://beebom.com/how-reset-and-flush-dns-cache-macos-sierra/
