Chosen Solution
My macbook suddenly lagged, like it takes a full minute to open an app or a file, I tried to restore it to factory settings and reinstall Mojave (since I did not have a time machine backup) but it still had the same problem. Also when powering up,when clicking the power button the screen just flashes and shuts down, I need to hold down the power button for it to properly boot ( this happened before and after the restore) but when it does boot up it still is very slow and the colour wheel just spins for a while before opening anything . I did the first aid and diagnostics and it said there wasn’t any problems found. Is there any way to fix this on my own or would I need to bring it to an Apple store?
Diagnostics is not a terribly sofisticated tool, it just provides basic info but many less evident faults go unnoticed. Since you already reinstalled the OS without a change it’s very likely there’s a hardware issue. Try unplugging the battery as a faulty one may cause throttling of the CPU and sluggish performance and see if the problem disappears. If things don’t get better in absence of a diagnostic hint there’s not much you can do on your own..replacing random parts may be a very expensive way of trying to fix a Mac.
Sounds like the CPU is getting throttled for some reason… could be a tired battery or perhaps the thermal paste between the heat sink and the CPU has dried up. To check battery health: Click the apple icon in the top left cornerHold down the Option key and select System InformationUnder the Hardware group, select PowerIn the right window, check Condition (should be Normal) If you’re interested in seeing how fast your CPU is actually running (in GHz), you can install Intel Power Gadget. It’ll show you both CPU core frequency and temperature.
Hi Michael brother. I am facing the same issue how did you you finally solve this problem
Might be of use but my screen hardware slowed my macbook to snail pace/unusable speed. It was sudden - one day my laptop was fine, suddenly its unusable. I tried SSD, logic board ets. Never thought that it would be the screen causing it. I bought a second hand laptop same model to try parts and replacing the screen fixed the problem! Put the original screen back and the problem came back. Can’t find anything online about this. Maybe worth a try if you can find another screen to test.
