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LewisAllen23

macrumors newbie
Nov 12, 2020
14
8
Just read on a blog this - don't know whether to trust or not:

'Open Terminal and Type

curl http://17.253.55.201/content/downlo...x1n2wpf8rik5agns2z43ikqu/InstallAssistant.pkg -H “Host: swcdn.apple.com” -o InstallAssistant.pkg


Basically the Software Update wants to download InstallAssistant.pkg from Apple CDN, but probably their CDN network has problems. So I’ve tried all the Apple CDN IPs and get one server working – 17.253.55.201

All CDN IPs are:

– 17.253.55.209
– 17.253.57.202
– 17.253.57.205
– 17.253.55.201
– 17.253.57.203
– 17.253.57.207
– 17.253.55.205
– 17.253.57.201
– 17.253.57.209
– 17.253.55.202'
The downloaded file seems to be legit, what do you guys reckon?
 

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romeo sanuri

macrumors newbie
Nov 12, 2020
4
3
just give it a bit of break and try the download it worked after a few tries. And if it stop, when you redownload it should continue where it stopped...mine is 40 sec to go. Will keep all of you posted.

i am testing on my MacBook Pro 13" 2015 first before on my iMac 2018
 

2979382

Cancelled
Aug 12, 2017
220
476
Since reading your message I tried updating my third & final mac - my Mac Mini, from Software Update in System Preferences

That's giving exactly the same 'Installation Failed' error as my iMac and my MacBook Pro - even though I hadn't previously tried to update it.

So if its working for you then either it's an intermittent issue and you're lucky :) Or it could be a regional thing (?) I'm in the UK...
Same issue in Ireland, just to confirm another region that doesn't work.
 
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romeo sanuri

macrumors newbie
Nov 12, 2020
4
3
just give it a bit of break and try the download it worked after a few tries. And if it stop, when you redownload it should continue where it stopped...mine is 40 sec to go. Will keep all of you posted.

i am testing on my MacBook Pro 13" 2015 first before on my iMac 2018
 

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cmaier

Suspended
Jul 25, 2007
25,407
33,453
California
I got it downloaded almost immediately after it was up on the internet... but then like many people, I get the “installation failed” message, and if I try again, it doesn’t need to download again since it’s downloaded, but it just returns that same “installation failed” message right away.
Yep. A lot of us are in the same boat. (Not sure my download ever actually completed, but now it won't even try - just the error message right away).
 

The_Martini_Cat

macrumors regular
Aug 4, 2015
229
236
Planned day: download mac os Big Sur, start setup, go get groceries while it reboots.
Actual day: get fed up, go get groceries, come back, find computer no longer works ok, run disk utility for an hour or so, eat crackers previously planned for later.
Tomorrow: "Automatically Keep My Mac up to date" is checked. Therefore, I will check out Big Sur just after breakfast! ??
 

Phil77354

Contributor
Jun 22, 2014
1,831
1,888
Pacific Northwest, U.S.
I got it downloaded almost immediately after it was up on the internet... but then like many people, I get the “installation failed” message, and if I try again, it doesn’t need to download again since it’s downloaded, but it just returns that same “installation failed” message right away.

Waitasecond - are you saying that if we get the 'installation failed' message, we have the update downloaded and it is simply not able to install?

That is a different kind of problem, if that is what is happening.

My interpretation until reading your post was that the problem was accessing one of the Apple servers in order to pull the upgrade file. I do not think that my earlier upgrade attempts were successful in getting the full download to my computer . . .
 

Steve686

macrumors 68040
Nov 13, 2007
3,639
1,550
US>FL>Miami/Dade>Sunny Isles Beach>Condo
Planned day: download mac os Big Sur, start setup, go get groceries while it reboots.
Actual day: get fed up, go get groceries, come back, find computer no longer works ok, run disk utility for an hour or so, eat crackers previously planned for later.
Tomorrow: "Automatically Keep My Mac up to date" is checked. Therefore, I will check out Big Sur just after breakfast! ??

Being an adult sucks, huh?
 

LewisAllen23

macrumors newbie
Nov 12, 2020
14
8
Just to add, when going back into System Preferences after doing this, it then navigates to the installer.
Moderators - Could you review my original post please. This might turn things around quite quickly. I'm not expert, hence why I need to see if this is actually legit. Thanks!
 
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