Before doing anything, I would wait and see if the fan activity ceases after a 
while.
Could be that the newly installed OS is busy indexing data, and once this 
process is completed, the fan activity will return to normal.

- Brad -



On Dec 29, 2023, at 16:59, Jonathan Cohn <jon.c.c...@gmail.com> wrote:

Another possibility besides more resource intenvive software, is dust or link 
buildup in the venting areas. If you have a nearby Apple store, there is a good 
chance, that they will take the cover off the bak and blow out accumulated dirt 
in the system for free.
If not, iFixIt should have the tools to open a Macbook, I believe they use a 
five pointed bolt head to prevent random folks from opening the case.


On Fri, Dec 29, 2023 at 1:23 PM 'Janina Sajka' via MacVisionaries 
<macvisionaries@googlegroups.com <mailto:macvisionaries@googlegroups.com>> 
wrote:
> Phil:
> 
> I still use my 2013 era Mac Air. I am fully updated to Big Sur, the
> lates it seems there will ever be for those older machines.
> 
> I can easily get my Air into a situations where the fans are running
> almost constantly. My solution is to minimize how many applications I
> keep open on the Air. There's an old saying about software expanding to
> take advantage of newer, more powerful hardware. I've always thought
> those fans are illustrating that old principle.
> 
> Best,
> Janina
> 
> Phil Halton writes:
> > I have an older MacBook Air from 2013 that is exhibiting a heck of a lot of 
> > fan activity these days. I upgraded to a MacBook Pro with the M3 Pro chip 
> > and I???m very happy with it but I???m trying to put some use to the old 
> > air. Last night I reinstalled the operating system after doing some first 
> > aid through disc utility And there???s still fan activity as far as I can 
> > tell. I reinstalled Catalina. I did not do a full erase and clean install, 
> > only a reinstall of the OS. I???m wondering, any ideas why all this fan 
> > activity is it aging Hardware? Or is it some kind of  Software problem, or 
> > even just data problems from years built up without ever erasing and 
> > reformatting. I???ll be glad to hear any ideas as to how I can bring this 
> > thing back to a reasonably good state of operation and if that means full 
> > of erasure and reinstall then I???d be willing to do that. Frankly I 
> > don???t see why this thing should be  choking on itself the way it is. 
> > Thanks for any advice. 
> > Sent from my IPhone
> > 
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> Janina Sajka (she/her/hers)
> Accessibility Consultant https://linkedin.com/in/jsajka
> 
> The World Wide Web Consortium (W3C), Web Accessibility Initiative (WAI)
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> 
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