I am not a specialist, but will begin the conversation:
So do you have a MacBook Air (13-inch, Early 2014) ?
4GB of 1600MHz LPDDR3 onboard memory
Configurable to 8GB.
- Intel HD Graphics 5000
- Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display, both at millions of colors
- Thunderbolt digital video output
- Native Mini DisplayPort output
- DVI output using Mini DisplayPort to DVI Adapter (sold separately)
- VGA output using Mini DisplayPort to VGA Adapter (sold separately)
- Dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (sold separately)
- HDMI audio and video output using third-party Mini DisplayPort to HDMI Adapter (sold separately)
- Ultra HD. 4K UHD (2160p) a resolution of 3840 pixels× 2160 lines (8.3 megapixels, aspect ratio 16:9)
So the integrated graphic processor is at his max all the time. which definition and frequency have you chosen?
- It can overheat, so yes shorten the life of components
- It can lack graphic memory
- the integrated processor doesn't have the power of a graphic card.
Would be interesting to have an EtreCheck report.
Copy and paste the report. We, a specialist could give you a clearer assessment.
Using EtreCheck
Regards.