I had 2010 MBP I upgraded that and it slowed down a lot where there was noticeable delay after u clicked something. I faced the same issue twice and got slapped by Apple both times. One can never be sure if Migration Assistant is bringing over some crap one would prefer to be without and does at least partially negate some of the benefit of a clean install. if one is willing to manually reinstall all the apps, copy back of your data and settings, etc.). I will add there's basically no chance that Big Sur is going to be faster in general, but if your system is bogged down by certain things on the current High Sierra the benefits of a full erase and clean install has the potential to offset the performance hit of Big Sur.Īnd I also 100% agree doing things without Migration Assistant is better (i.e. I should have specified in my original instructions (for original macOS then Mojave upgrade) to use the shift-option-command-r variation of IR. use the opt-cmd-r variation of IR to get to a Big Sur reinstall from recovery as opposed to shift-opt-cmd-r variation of IR to get access to whatever original macOS came with your 2015 MacBook (requiring a later manual upgrade beyond that). I agree, if super-keen on trying Big Sur, for step 3 use Option-Command-R (no shift key) to directly go from the erased drive to a clean install of Big Sur.Įxplanation: Since your firmware has been updated ( by virtue of ever being on High Sierra 10.13+ previously) you'll be able to do that, i.e. I never saw huge amounts of dust build up in my Mac Pro tower so if you mainly keep the laptop on a desk, in a normal clean apartment/house and don't smoke, then you'll probably be fine for at least a few years. Excessive use if candles or smoking is likely to cover the inside of electronics with wax/tar. towers computer) will probably suck in more dust & dirt than ones placed on a table (iMac, laptop, …). In regards to how frequently this might need to be done, this will depend on the environment where the computer is kept. I would then wait ~30 min for any moisture to disapate, after which I would reassemble and turn on the mac.įor laptops I would assume that it's enough to shut it down before opening it up and cleaning it. With my old 2008 Mac Pro tower (replaced in 2018) I used to occasionally unplug it and blow out the dust with canned air. I don’t know how worried I should actually be about the slowing down and lagging so any help is appreciated :)ĮDIT: The general consensus seems to be that I should either leave it at High Sierra since nothing is wrong performance wise it’s just the heating up - or to get Mojave/Catalina - I’m wondering about everything yallve said about taking the bottom panel off to clean the fans, is there a “best”/“safest” way to do this, and does anyone know if there’s a way to just back my phone up without updating ? That’s my biggest problem and I’d rather not cause a bigger problem by updating if i don’t have to :) Thank y’all, youve been really helpful !! I would just leave it at High Sierra honestly but I want to back my phone up to it and the people at Apple as well as most third party advice says the only way to get around the alert that says my computer can’t read my phone without snd update is to update. My sister tried to combat this same problem on her laptop by upgrading and now it’s really slow and laggy, which doesn’t work for me since I need a lot of responsiveness with my drawing tablet. However it’s getting now to a point where it’s not slow but it gets hot when I open any app. I’m a digital artist and animator so I require a lot from it but it’s held up the last 6 years.
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