If your Macbook isn't recognizing an external display, it can be a frustrating experience. Fortunately, it's usually a benign problem that can be easily fixed by checking the connectors and adapters, rebooting or updating the device. However, if all of these steps don't work, it may be time to take your Macbook in for service. On MacBook Pro models, the issue may not be visible, but it's quite evident on MacBook Air devices with Intel CPUs.
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On average, your MacBook Pro is expected to last 7 or 2 years and a MacBook Air between 5 and 7 years. However, the lifespan of your MacBook depends on the tasks you use it for, how often you use it, and how well you take care of the battery and its components.
If you own a Macbook, you may be wondering if it's time to apply a new thermal paste. The main indication that you need to replace the thermal compound is if your device is running at unusually high temperatures.