iMac. Windows are shrunk to 1/4 of screen. I can't close or enlarge any windows.

[3Hotdogs]

Three dots and arrows do not appear.

Reboot does not help

[Tetrachloride]

1. if u can see a WINDOW menu on top of screen, choose ZOOM

if u can see a WINDOW menu on top of screen, choose ZOOM

------

System Preferences / Display for general window settings

[3Hotdogs]

2. There is no windows menu that I can find

[Tetrachloride]

3. 1. System Preferences / Display

can you adjust your size there ? example. 1920x1024 ?

[3Hotdogs]

4. I can't find such a setting.

[usonian]

5. Check System Preferences -- Displays and see if your resolution has been changed from Default.

I hope your system won't need the hard reset .... PRAM? I forgot, but can look it up.

[3Hotdogs]

6. It is still in default setting

[3Hotdogs]

13. It seems to be at default. F5 doesn't seem to do anything.

Windows - zoom is grey and cannot be accessed.

[usonian]

14. Sorry to hear that. One suggestion (that I tried successfully at home).

I was running old versions of MacOS. So old that some software I really want did not run.

The history of this is that I was on a cellular hot-spot, so upgrades were over quota.

I got the DSL (yeah, that's the best we have here) so I upgraded two macs to Mojave (which is still behind the curve, but this gear is getting old) I found an installer download so I didn't have to download twice, and risk the install failing due to an internet glitch (and having to do it all over, and over)

I didn't have any crazy problems to fix, but on the imac, the app store would just eat up all my resources and do nothing, and iMessage never would sign in no matter what I did. I had to sneaker-net apps from another machine and then verify them the first time they ran. Not good.

Things are better now.

I *did* a full backup of both systems before running the installer. I used SuperDuper with an external disk the same size as the internal disk, and it makes a bootable clone of the system disk, for what that's worth. The free version only does the mirroring, no incremental backups.

I don't know if you can do that or want to, but a fresh start seems called for.

Good luck.
If you go to the Geek Squad, make sure your disks are squeaky clean. They scan for "porn", in a secret alliance with the cops, and there have been instances where bare-ass baby photos have gotten people in big trouble.

I don't know if Apple Geniuses are any better or worse.

FWIW, the upgrades left all my files untouched. Though, it did try to move my home directory to iCloud. Upon upgrade, check iCloud Preferences and turn that off if you don't want your home in the cloud. I like it on the local disk.

[3Hotdogs]

15. Thanx, There is no porn, child, animal space alienor whatever else on this machine.

[3Hotdogs]

16. Thanx, There is no porn, child, animal space alienor whatever else on this machine.

[Tetrachloride]

7. Reboot the PRAM

1. Shut down your Mac. Wait 20 seconds.

2. Turn your Mac on. Immediately press and hold the command + option + P + R keys.

3. Continue to hold the command + option + P + R keys for a minimum of 20 seconds; longer is fine but not necessary.

4. After 20 seconds, you can release the keys.

https://www.lifewire.com/how-to-reset-mac-pram-or-nvram-2260839

[Tetrachloride]

8. Alternatively, PRAM reset in Terminal app

1. Launch Terminal, located at /Applications/Utilities.

2. Type

nvram ​-c

3. Then hit return or enter on your keyboard.

4. Reboot Mac.

[3Hotdogs]

9. There is no place to enter anything in the terminal.

I guess its off to Geek squad for me.

[usonian]

10. No geek squad!

Try this:
https://discussions.apple.com/docs/DOC-3603

PRAM RESET


Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R.
You will need to hold these keys down simultaneously in step 4.

Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

Why?
https://www.lifewire.com/how-to-reset-mac-pram-or-nvram-2260839

Most Mac users don't think much about their Mac's parameter RAM, but it works hard anyway, keeping track of the following:

Startup volume
Speaker volume
Display settings (resolution, color depth, refresh rate, number of displays)
Kernel panics information
DVD region settings
Date and time, including time zone
Computer name
Backlight levels
Keyboard language
Location services state (enabled or disabled)

Resetting the Parameter RAM

One easy fix for many issues is to simply reset the parameter RAM to its default state. This will cause some data to be lost, specifically the date, the time, and the startup volume selection. Luckily, you can easily correct these settings using your Mac's System Preferences.

The steps needed to reset the parameter RAM are the same, regardless of whether your Mac uses NVRAM or PRAM.

Shut down your Mac.
Turn your Mac back on.
Immediately press and hold the following keys: command+option+P+R. That's four keys: the command key, the option key, the letter P, and the letter R. You must press and hold these four keys before you see the gray screen during the startup process.
Continue to hold down the four keys. This is a long process, during which your Mac will restart on its own.
Finally, when you hear the second startup chime, you can release the keys.
Your Mac will finish the startup process.

[3Hotdogs]

11. OK I got out of the loop.

Now, I need to increase the size of the window.

[usonian]

12. Try #5, preferences-resolution. Hope it works.

https://democraticunderground.com/?com=view_post&forum=1096&pid=6156