Login Screen Resolution Issue
Your OSX login screen displays at an incorrect resolution. This resolution is different to that of the desktop. Usually your login screen will display at a lower resolution, which causes your log-in window to look big with large text. Once you login your desktop display resolution is as you would expect.
Login Screen Resolution Cause
The system stores different resolution settings for individual user accounts and for globally accessible areas, like the login screen. When switching between displays, for example when using projectors or an external display, this resolution sometimes gets set incorrectly or stuck at a previous resolution.
Login Screen Resolution FIX
To fix this you can reset the PRAM. This will force the system to reset the resolution of the login screen.
Choose Apple menu > Shut Down.
Locate the following keys on the keyboard: Option, Command (⌘), P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on your Mac.
Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the gray screen appears.
Continue holding the keys down until your Mac restarts, and you hear the startup sound for the second time.
Release the keys.
Apple support article: OS X Yosemite: Reset your computer’s PRAM
Thanks for reading, hope it helped!
I had a similar problem, but it changed resolution because my administrator account was on a different resolution. I’ve logged in as admin and set it back to “default” and it’s fixed now system-wide (on Mac Sierra). I hope this helps anybody with the same issue.
Thanks. Worked perfectly
My FIX: change screen resolution from “scaled” to “default” then logout and on logout screen click shutdown, after restart change resolution to more space then logout, shutdown and restart
It worked on MacBook Pro Retina (Late 2013)
I’m having the same issue. I have a MBP Retina 13″ 2015 with Yosemite, last version at this time. I tried this method but nothing changed. Has somebody the same issue with the same machine and could fix this annoying problem.
Thanks a lot !!!!!
Worked perfectly thank you!!
Hi Guy, thanks for the info, I understand now. Cheers!
Hi Chris, I also have a rMBP “15. It’s worth noting that the login screen wil always have the “default” and not a ‘scaled’ retina resolution. This means your login screen wil always look like 1440 x 900 (text should still be crisp). The issue described here is is the login screen get’s stuck on a lower resolution. Hope this helps.
Hi, I have a rMBP 15″ and i have reset the PRAM 100 times, but the login resolution still is the same.
Please help with a different fix.
Worked perfectly. Thanks!
Took a while but worked for me! Had to also unplug all external devices, change my screen resolution, reboot then change back to default. thanks for the help!
It worked fine (i.e., opt+command+R+P). The issue of low resolution opening screen occur when I connect my MB15 Retina to a projector. But, if I change the resolution to retina before disconnecting the projector. It goes back to the retina resolution, with no problem. The issue of low resolution opening screen happens only when I didn’t change the mac display resolution to its original resolution before disconnecting external devices.
Thanks alot, it worked perfectly on my MacBook Pro 15″ Retina.
It was driving me crazy 🙂
This did not work for me either. MacBook Pro (Retina, 15-inch, Early 2013)
Perfect, it works!!! Thank you so much… was getting mad!
This worked perfectly! Thanks!
Thanks! Helped for me 🙂
Thanks very much, it worked for me.
The resolution changed after I plugged in an external display for
I have a MacBookPro10,1
(I made a fresh install of Yosemite)
I Zapped Pram, reset reboot and everything but still low res on login,
while switching between users is high res….
Definitely a bug….
Hi Roger, Did you try changing the display resolution to a different setting, then rebooting and changing it back to the desired resolution? Make sure you are logged in as an administrator.
I didn’t work for me in my macbook pro retina 15 Early 2013 🙁
I tried as administrator
I use 1920×1200 as desktop resolution but it looks as scaled for retina in the login screen. Any other solution?
Hi Erich, try creating another admin user and see if the issue persists.
Yes, I am running OS X 10.10.1. An there are no other ext devices connected. I already reinstalled the OS. The issue is only at systemstart. Once the system is running, I can go in suspend mode and reactivate the Macbook, the Login Screen is at correct resolution…..
Hi Erich, so the issue occurs when you have no other external devices connected? Are you running OS X 10.10.1? If not try upgrading.
When my Thunderbolt Display is connected, I do not have this issue. It occurs only when my internal Display is running on 1680×1050 resolution…
Hi Erich, can you confirm that the issue occurs exclusively when external displays are connected?
Yes, I tried it with different resolutions. It´s working with the lowest resolutions…. But I want it with the highest resolution (1680×1050). And thats not working. I am logged in as Admin….
Hi Erich. Did you try changing the display resolution to a different setting, then rebooting and changing it back to the desired resolution? Make sure you are logged in as an administrator.
this did not work for my macbook retina 13 late 2013. i tried to reinstall. no fix. pram no fix.