Late 2015 iMac with an intermittent video issue

[TraceyS/FL]

Soooo, this computer is going to do me in I think. It's only happened 2-3 times - and last time I got it to stop by unplugging the external monitor. Today I just turned it off and it didn't really help. It is completely predictable in the since that every time it has done it, I have gone up to the upper right icon in Safari to show me all my tabs open. It seems to be a RAM issue - i'm assuming video? I had a hard time quitting Safari today with it going on its glitchy way... I admit I probably have wayyyyy too many tabs open, but I thought that didn't matter these day! LOL

The computer has been low use, currently in an air conditioned room and doesn't feel hot. I can feel the screen being warmer where the CPU probably is when I feel the glass.


I think this is the link that will work to the video of it...

Model Name: iMac
Model Identifier: iMac17,1
Processor Name: Intel Core i5
Processor Speed: 3.3 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 24 GB
Boot ROM Version: 161.0.0.0.0
SMC Version (system): 2.34f2

Graphics/Displays
AMD Radeon R9 M395:
Chipset Model: AMD Radeon R9 M395
Type: GPU
Bus: PCIe
PCIe Lane Width: x16
VRAM (Dynamic, Max): 2048 MB
Vendor: AMD (0x1002)
Device ID: 0x6920
Revision ID: 0x0001
ROM Revision: 113-C905AA-799
VBIOS Version: 113-C905A1-007
EFI Driver Version: 01.00.799
Metal: Supported, feature set macOS GPUFamily2 v1
Displays:
iMac:
Display Type: Built-In Retina LCD
Resolution: 5120 x 2880 Retina
Framebuffer Depth: 30-Bit Color (ARGB2101010)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Automatically Adjust Brightness: No
DELL P2715Q:
Resolution: 2160 x 3840
UI Looks like: 1080 x 1920 @ 60 Hz
Framebuffer Depth: 30-Bit Color (ARGB2101010)
Display Serial Number: 54KKD76CCAWL
Mirror: Off
Online: Yes
Rotation: 90
Adapter Type: DisplayPort
Automatically Adjust Brightness: No

 

[redheeler]

I've had this happen before. It's a software bug. Disappointing that Apple still hasn't fixed this and the terrible performance of the Safari tab overview with a large amount of tabs open.

 

[TraceyS/FL]

I've had this happen before. It's a software bug. Disappointing that Apple still hasn't fixed this and the terrible performance of the Safari tab overview with a large amount of tabs open.

Ok, i'm going to take "happy to hear it is a software bug" for $500 today Alex... because this Mom doesn't have the money for a repair.

I'll go report it and just stop using the blasted button then. Thank you!!