Lalette wrote:
I open a file in a finder window, then I go to "open new finder window." A new window pops up. When I open a new file in that window, the file in the original window changes to the new file so that I do not have two finder window in which to compare. Have tried the half screen option. Does not work. What am I doing wrong?
Very strange behavior you are describing...
Try Relaunch the Finder on the fly from the >Force Quite>Finder>Relaunch
and test.
What about changing to Tabs? Finder>Preferences>General Same result?
Uninstall all third party apps that are Cleaners/Optimizers/VPN/Anti-Virus
To trouble shoot further you can:
—Try a SafeBoot https://support.apple.com/en-us/HT201262
Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc.
Login and test. Reboot as normal and test as caches get rebuilt.
In Safe mode third party system modifications and system accelerations are disabled, it removes malware, etc hampering smooth operation, however a reboot will put it back to normal mode.
This test will tell you if third party interference; extensions etc are not loaded in safe boot mode.
—Test issue in another user (or guest user) account https://support.apple.com/guide/mac-help/set-up-other-users-on-your-mac-mtusr001/mac
This will tell you if it a universal issue or isolated to your user/admin account.