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From: David Brooks <BDB@nomail.afraid.org>
Newsgroups: alt.computer.workshop,comp.sys.mac.system
Subject: Re: What does "Reinstall macOS" do, exactly?
Date: Mon, 19 Aug 2024 08:57:33 +0100
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On 18/08/2024 23:56, Alan wrote:
> On 2024-08-18 14:42, David Brooks wrote:
>> On 18/08/2024 22:06, pothead wrote:
>>> On 2024-08-18, David Brooks <BDB@nomail.afraid.org> wrote:
>>>> On 18/08/2024 21:17, pothead wrote:
>>>>> On 2024-08-18, David Brooks <BDB@nomail.afraid.org> wrote:
>>>>>> //I was recently having some problems with iTunes, and decided to
>>>>>> reinstall macOS Sierra. I held Command+R on startup and clicked on
>>>>>> "Reinstall macOS" without erasing the hard drive in Disk Utility. 
>>>>>> Once
>>>>>> the reinstall was complete, I started back up and all of my files and
>>>>>> programs were still there, along with my settings, desktop wallpaper,
>>>>>> and everything else. (The iTunes problems were fixed.)//
>>>>>>
>>>>>> What exactly does this "Reinstall" feature do, if it doesn't remove
>>>>>> programs and change settings to default?//
>>>>>>
>>>>>> Here are answers on-line:-
>>>>>> https://apple.stackexchange.com/questions/276766/what-does- 
>>>>>> reinstall-macos-do-exactly
>>>>>>
>>>>>> How would YOU have answered the OP's question?
>>>>>
>>>>> That article is from 7 years ago.
>>>>
>>>> So? Why does that matter?
>>>
>>> Because technology changes rapidly.
>>
>> This part of macOS has NOT changed at all.
> 
> Says the guy who asked "what does it do?"...

It wasn't me who asked the question on Stack Exchange.

>> How many folk realise that
>> reinstalling the macOS will NOT eradicate any previously installed 
>> malware?

Read 'pothead's reply'. He said ....

Probably not many.
Fair point.
Even a low level format in the Windows world does not guarantee the 
removal of ALL malware.
Probably 95+ percent of malware but not 100%

=

I completely agree with him.

-- 
David