2013 imac 27 inch stuck resolution

Restart the computer in Safe Mode and then restart normally, if that doesn't fix it then re-install Mac OS again. If that doesn't work, then I'm out of ideas and you need to take it in to be looked at.

EtreCheck version: 3.4 (420)

Report generated 2017-07-11 17:15:20

Download EtreCheck from https://etrecheck.com

Runtime: 3:00

Performance: Good

Click the [Lookup] links for more information from Apple Support Communities.

Click the [Details] links for more information about that line.

Click the [Remove/Report] links to remove adware or update the whitelist of legitimate software.

Problem: Other problem

Description:

Screen resolution on iMac 27 inch stuck at 1280 x 720

Hardware Information:ⓘ

iMac (27-inch, Late 2012)

[Technical Specifications] - [User Guide] - [Warranty & Service]

iMac - model: iMac13,2

1 3.4 GHz Intel Core i7 (i7-3770) CPU: 4-core

32 GB RAM Upgradeable - [Instructions]

BANK 0/DIMM0

8 GB DDR3 1600 MHz ok

BANK 1/DIMM0

8 GB DDR3 1600 MHz ok

BANK 0/DIMM1

8 GB DDR3 1600 MHz ok

BANK 1/DIMM1

8 GB DDR3 1600 MHz ok

Bluetooth: Good - Handoff/Airdrop2 supported

Wireless:
en1: 802.11 a/b/g/n

iCloud Quota: 10.50 GB available

Video Information:ⓘ

NVIDIA GeForce GTX 680MX - VRAM: 2048 MB

iMac 1280 x 720

Disk Information:ⓘ

APPLE HDD ST3000DM001 disk1: (3 TB) (Rotational)

[Show SMART report]

EFI (disk1s1 - MS-DOS FAT32) <not mounted>
[EFI]: 210 MB

(disk1s2) <not mounted>
[CoreStorage Container]: 3.00 TB

Recovery HD (disk1s3 - Journaled HFS+) <not mounted>
[Recovery]: 650 MB

APPLE SSD SM128E disk0: (121.33 GB) (Solid State - TRIM: Yes)

[Show SMART report]

EFI (disk0s1 - MS-DOS FAT32) <not mounted>
[EFI]: 210 MB

(disk0s2) <not mounted>
[CoreStorage Container]: 120.99 GB

Boot OS X (disk0s3 - Journaled HFS+) <not mounted> : 134 MB

USB Information:ⓘ

USB20Bus

hub_device

[redacted] Inc. FaceTime HD Camera (Built-in)

USB20Bus

hub_device

hub_device

[redacted] Inc. BRCM20702 Hub

[redacted] Inc. Bluetooth USB Host Controller

USB30Bus

Thunderbolt Information:ⓘ

Apple Inc. thunderbolt_bus

Virtual disks:ⓘ

Macintosh HD (disk2 - Journaled HFS+) /
[Startup]: 3.11 TB (361.73 GB free)

Physical disk: disk0s2 120.99 GB Online

Physical disk: disk1s2 3.00 TB Online

System Software:ⓘ

macOS Sierra
10.12.5 (16F73) - Time since boot: less than an hour

Gatekeeper:ⓘ

Mac App Store and identified developers

Possible adware:ⓘ

Adware: ~/Library/Caches/com.[redacted].Safari/Extensions/Slick Savings.safariextension

Adware: ~/Library/LaunchAgents/com.bittorrent.uTorrent.plist

Adware: ~/Library/LaunchAgents/com.spigot.ApplicationManager.plist

Adware: ~/Library/Safari/Extensions/Ebay Shopping Assistant.safariextz

Adware: ~/Library/Safari/Extensions/Searchme.safariextz

Adware: ~/Library/Safari/Extensions/Slick Savings.safariextz

6 possible adware files found. [Remove/Report]

Kernel Extensions:ⓘ

/Applications/Parallels Desktop.app

[not loaded] com.parallels.kext.hypervisor (11.0.0 31193 - SDK 10.9) [Lookup]

[not loaded] com.parallels.kext.netbridge (11.0.0 31193 - SDK 10.9) [Lookup]

[not loaded] com.parallels.kext.usbconnect (11.0.0 31193 - SDK 10.9) [Lookup]

[not loaded] com.parallels.kext.vnic (11.0.0 31193 - SDK 10.9) [Lookup]

/System/Library/Extensions

[not loaded] com.dymo.usbprinterclassdriver.kext (1.1 - SDK 10.9) [Lookup]

System Launch Agents:ⓘ

[not loaded] 6 Apple tasks

[loaded] 184 Apple tasks

[running] 92 Apple tasks

System Launch Daemons:ⓘ

[not loaded] 41 Apple tasks

[loaded] 170 Apple tasks

[running] 106 Apple tasks

Launch Agents:ⓘ

[not loaded] com.adobe.AAM.Updater-1.0.plist (Adobe Systems, Inc. - installed 2016-08-27) [Lookup]

[running] com.adobe.AdobeCreativeCloud.plist (Adobe Systems, Inc. - installed 2016-08-27) [Lookup]

Launch Daemons:ⓘ

[running] com.adobe.adobeupdatedaemon.plist (Adobe Systems, Inc. - installed 2016-08-27) [Lookup]

[running] com.adobe.agsservice.plist (Adobe Systems, Inc. - installed 2017-05-25) [Lookup]

[loaded] com.adobe.fpsaud.plist (? 2afb3af7 bda8713f - installed 2016-06-14) [Lookup]

[loaded] com.[redacted].installer.osmessagetracing.plist (Apple, Inc. - installed 2017-04-29)

[running] com.bombich.ccchelper.plist (Bombich Software, Inc. - installed 2017-05-12) [Lookup]

[not loaded] com.dymo.pnpd.plist (? 0 ? - installed 2014-10-17) [Lookup]

[running] com.huawei.mbbservice.plist (? d59902d6 599c7d6e - installed 2017-06-23) [Lookup]

[loaded] com.macpaw.CleanMyMac3.Agent.plist (MacPaw Inc. - installed 2017-05-28) [Lookup]

[loaded] com.microsoft.autoupdate.helper.plist (Microsoft Corporation - installed 2017-05-01) [Lookup]

[loaded] com.microsoft.office.licensing.helper.plist (? 6d8cb30e afb3bef0 - installed 2010-08-25) [Lookup]

[running] net.ivpn.client.Helper.plist (IVPN LTD - installed 2017-03-20) [Lookup]

User Launch Agents:ⓘ

[loaded] com.adobe.AAM.Updater-1.0.plist (Adobe Systems, Inc. - installed 2016-08-27) [Lookup]

[loaded] com.bittorrent.uTorrent.plist (? ? ? - installed 2016-06-08) Adware!
[Remove/Report]

/Applications/uTorrent.app

[loaded] com.google.keystone.agent.plist (Google, Inc. - installed 2017-03-29) [Lookup]

[loaded] com.macpaw.CleanMyMac3.Scheduler.plist (MacPaw Inc. - installed 2017-07-10) [Lookup]

[loaded] com.skype.skype.shareagent.plist (Skype Communications S.a.r.l - installed 2017-06-30) [Lookup]

[running] com.spigot.ApplicationManager.plist (? 6ba17cce 87487c5f - installed 2016-03-08) Adware!
[Remove/Report]

~/Library/Application Support/Spigot/ApplicationManager

User Login Items:ⓘ

FreeSpace Application

(/Applications/FreeSpace.app)

iTunesHelper Application (Apple, Inc. - installed 2017-05-28)

(/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

NeoFinder Global QuickFind Application

(~/Downloads/Software/NeoFinder.app/Contents/Resources/NeoFinder Global QuickFind.app)

CleanMyMac 3 Menu Application (MacPaw Inc. - installed 2017-06-14)

(/Applications/CleanMyMac 3.app/Contents/MacOS/CleanMyMac 3 Menu.app)

CCC User Agent Application (Bombich Software, Inc. - installed 2017-05-14)

(/Applications/Carbon Copy Cloner.app/Contents/Library/LoginItems/CCC User Agent.app)

join.me Launcher Application

(~/Library/Application Support/join.me/join.me Launcher.app)

Android File Transfer Agent Application

(~/Library/Application Support/Google/Android File Transfer/Android File Transfer Agent.app)

Internet Plug-ins:ⓘ

AdobeAAMDetect: 3.0.0.0 (installed 2016-08-27) [Lookup]

FlashPlayer-10.6: 22.0.0.192 (installed 2016-07-08) [Lookup]

QuickTime Plugin: 7.7.3 (installed 2017-04-29)

Flash Player: 22.0.0.192 (installed 2016-07-08) Outdated! Update

DYMO NPAPI Addin: 1.0 (installed 2014-10-17) [Lookup]

SharePointBrowserPlugin: 14.7.3 (installed 2017-05-01) [Lookup]

DYMO Safari Addin: Unknown (installed 2014-10-17) [Lookup]

Safari Extensions:ⓘ

[not loaded] Searchme (installed 2015-11-03) Adware!
[Remove/Report]

[not loaded] eBay Shopping Assistant (installed 2015-11-03) Adware!
[Remove/Report]

[not loaded] Open in Internet Explorer - Parallels - http://www.parallels.com (installed 2015-12-12)

[enabled] Slick Savings (installed 2015-12-15) Adware!
[Remove/Report]

3rd Party Preference Panes:ⓘ

Flash Player (installed 2016-06-14) [Lookup]

Time Machine:ⓘ

Skip System Files: NO

Mobile backups: OFF

Auto backup: YES

Volumes being backed up:

Macintosh HD: Disk size: 3.11 TB Disk used: 2.74 TB

Destinations:

Time Machine [Local]

Total size: 6.00 TB

Total number of backups: 16

Oldest backup: 2/5/17, 9:44 pm

Last backup: 11/7/17, 10:09 am

Size of backup disk: Too small

Backup size 6.00 TB < (Disk used 2.74 TB X 3)

Top Processes by CPU:ⓘ

7%
Google Chrome

2%
WindowServer

1%
kernel_task

1%
Google Chrome Helper

1%
fontd

Top Processes by Memory:ⓘ

1.34 GB
kernel_task

248 MB Google Chrome

155 MB assistant_service

149 MB assistantd

145 MB mds_stores

Top Processes by Network Use:ⓘ

Input Output Process name

56 KB 44 KB mDNSResponder

9 KB 15 KB apsd

4 KB 3 KB assistantd

522 B 354 B netbiosd

288 B 288 B ntpd

Top Processes by Energy Use:ⓘ

3.62 Google Chrome

2.92 Creative Cloud

1.92 WindowServer

0.68 Adobe CEF Helper

0.38 Google Chrome Helper

Virtual Memory Information:ⓘ

27.46 GB
Available RAM

24.55 GB
Free RAM

4.54 GB
Used RAM

2.91 GB
Cached files

0 B Swap Used

Software installs:ⓘ

MobileBrServ:
(installed 2017-06-23)

WEB Partner:
(installed 2017-06-23)

HandsFree 2: 2.6.3 (installed 2017-06-28)

Stock +: 3.8 (installed 2017-06-28)

ShutterCount: 3.0 (installed 2017-06-28)

Kindle: 1.20.2 (installed 2017-06-28)

HandsFree 2: 2.6.4 (installed 2017-07-05)

Install information may not be complete.

Please post an EtreCheck report of your system and we can then look for obvious problems. Click the link and download and run the app. Then copy and paste the entire report as your reply to this message.

Well okay, thats a weird one , I suspect a corrupt install of Mac OS.

First backup the computer using Time Machine or create a bootable clone using SuperDuper or Carbon Copy Cloner. You have not been backing up your computer and that must, repeat MUST be done or you will eventually lose critical data. You need an external HD (I recommend OWC (www.macsales.com) Mercury Elite Pro line and create your backup.

After you have acquired an external HD and backed up the computer, remember to test the backup before going to the next step, then restart the computer in the Recovery Partition by restarting and holding down Command + R. After it has restart in Recovery Partition re-install Mac OS on the drive you have Mac OS installed on. This type of install will not overwrite data however it is critical you have a backup just-in-case of a problem.

WillisPwnZeR wrote:

I'm going to do a full clean install of Sierra and see if that works. will also try your suggestions. ever done any service without AppleCare what kind of prices would I be looking at?

You have to call and find out.

I have the same problem. My Imac is a late 2011 model on which I have "Frankensteined" an Nvidia Geforce 765M taken from a Clevo laptop. Like you, I am only presented with one resolution; 1280X870. Worse still, the display stays black. Luckily, I had previously set the computer up for screen sharing so that I can reset the startup drive on which I have 10.12.4. Please note that this only happened when I updated from 10.12.4 to 10.12.5. Prior to that, the video performance was just fine (although I had no boot screen). I have also installed the newly-released Nvidia web drivers. I can switch between the drivers that are bundled with the system software and the Nvidia web drivers but it makes no difference. I have noticed that the 2013 27-inch Imacs all use Nvidia video cards (755 and 775). That seems to be the common denominator between your system and mine: closely related Nvidia cards. Anyway, if anyone can shed any light on this frustrating problem, I, for one, would be most appreciative.

Thanks in advance.

Go Sens!

Does anyone have any other insights into this? I find it ridiculous that, as one contributor posted, The Apple Store replaced the computer's motherboard to solve this problem. The computers work just fine on anything before 10.12.5.

Nothing obvious in your report, please post a screen shot of your System Preferences - Displays - Display - Scaled

Did you go to System prefs/ Displays and change resolution to Default for Display?