I've got an external Dell monitor attached to my M1 Big Sur MacBook Air that's rotatable. I tried swiveling the monitor into the 90° position and set the Display Preference "Rotation" to the same to let the system know, but decided ultimately that I prefer the standard landscape orientation. However while I can reset the Display Preference to 0°, it doesn't stick. Every time the machine goes to sleep and then reawakens, the monitor thinks it's still in the 90° position and I have to manually reset the Display Preference back to "Standard" (0°) again. This works until the next time my machine goes to sleep and is reawakened again. This is frustrating. There's a /Library/Preferences file called "com.apple.windowserver.displays.plist" that contains several references to the external monitor and its 90° setting, but I don't know if this file is editable and am reluctant to fiddle with it, assuming I even can. Any suggestions on how to fix this?

Another developer tried to start a screen-sharing session with me on my M1 MacBook Air this morning (Sequoia 15.3). He reported however that another session was already under way on my machine. I looked in System Settings and found that the "Screen Sharing" setting was grayed out, with the notation that "This service is currently being controlled by the Remote Management service". Access to the service is disabled however, and I have no way of turning it off. It's possible that the person who tried to help me got this session started, and that it then got aborted in some irregular way, but he see no indication of that and says there is no connection between us as seen from his end. This makes me nervous security-wise. Is there some way I can turn this off and ensure that I am not being screen-shared against my will, as it were? TIA, Howard

I've got a new 8GB MacBook Air, which is a lovely machine, but I'm not sure if I should really be upgrading to a 16GB model. I've been playing with Activity Monitor, and it's not hard to get Memory Usage up to 7GB or so, with a good load of Safari tabs, Xcode running smallish projects, Google Earth Pro, and a half dozen or so other apps open and running. I'm not noticing any particular slowness (that I can tell) but am not sure what other metrics I might be looking at to determine if more memory would be better. Any thoughts? TIA.

My Mac version of Safari (14.4) has somehow lost the entire contents of its Tab Group Favorites list. The Tab Group titles are still there, but the contents of each Tab Group is empty; ie clicking on a title does nothing except rotate the disclosure symbol by 90 degrees. The Favorites list on my iPad however is still fully populated. Is there any way of forcing a resynch between the two devices so that the full list on my iPad repopulates the semi-empty list on my Mac ("semi-empty" because the titles are still there). And if I can do a resynch, how do I guarantee that the resynch is FROM my iPad TO my Mac and not the other way around (ie, so I don't end up with two empty lists)? TIA Howard