Level 1

28 points

Mojave Installation - An error occured validating the installer data. The download is either damaged or incomplete.

I am trying to install Mac OS Majove, i've tried to download the file more than 7 times already, and always get the same Error.

An error occured validating the installer data. The download is either damaged or incomplete.

Redownload the installer and try again.

I have tried every trick in the book, resetting SMC, PRAM... i even tried to delete the Cache of the app store just to make sure i'd get a fresh download each time, and still the same error.

I've tried to install the OS either by directly doing so after the download or even tried to create a bootable USB and boot up the Mac, same error...

My Technical Configuration is as follows:

MacBook Pro (Retina, 15-inch, Mid 2015)

2.5 GHz Intel Core i7

16 GB 1600 MHz DDR3

Currently Running Mac OS High Sierra 10.13.6

All the posts suggest making sure the date is correct or resetting the configurations.. I've tried them all, and always get the same error.

I have no idea what to do next, i've run out of tricks...can anyone help me out?

MacBook Pro (Retina, 15-inch, Mid 2015), macOS Mojave (10.14), null

Posted on Sep 29, 2018 4:09 AM

Top-ranking reply

Elias Rahme Author

Level 1

28 points

Posted on Oct 6, 2018 12:08 AM

The solution was just as Jeff_w suggested, the safe mode won’t work, but try to downlod the installer through a different wifi, that’s what i did and it worked.

I’m guessing the problem was when i initially downloaded the installer, the wifi got disconnected, so maybe my isp cached a broken version of the installer, so whenever i tried to download it back, it was always calling the same broken version.

So when i downloaded it through a different network, it worked perfectly

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30 replies

Sneffels

Level 1

9 points

Oct 24, 2018 5:28 PM in response to Jeff_W.

I'm getting the same error installing it from a bootable USB installer.

Oct 24, 2018 11:23 PM in response to Elias Rahme

Just because one suggestion worked for you does not mean that is the only problem. Changing the WiFi connection made no difference to my error. The problem REMAINS when I change the connection!

Oct 25, 2018 1:17 AM in response to Elias Rahme

The first attempt was using my landline based broadband through my ISP. The second attempt was over 4G tethered to my mobile. Two completely different ISPs

oki84

Level 1

9 points

Oct 25, 2018 7:07 PM in response to jonathan_knight

I did the same thing and still no luck. Any solutions out there?

Elias Rahme Author

Level 1

28 points

Nov 20, 2018 6:36 AM in response to Sneffels

i have a linksys router too! and if i'm not mistaken i guess its the same model...maybe it's a linksys prob!

Nov 21, 2018 4:30 AM in response to oki84

Thanks this solved the problem.

oki84

Level 1

9 points

Nov 21, 2018 4:55 AM in response to sandeep_k

Glad it worked for you

Dec 25, 2018 4:16 AM in response to Elias Rahme

An error occured validating the installer data. The download is either damaged or incomplete.

Jan 28, 2019 6:00 AM in response to Elias Rahme

https://techiestechguide.com/an-error-occurred-validating-the-installer-data/

Feb 17, 2019 7:14 PM in response to Elias Rahme

PLEASE! Do not use CleanMyMac. I do computer repairs and it does WAY more damage to your system than good.

ozdabozz

Level 1

4 points

Feb 18, 2019 2:05 AM in response to Jeff_W.

how can I reinstall ?

ozdabozz

Level 1

4 points

Feb 18, 2019 2:06 AM in response to ozdabozz

sorry, how do I re download? thx

Jun 1, 2019 12:31 AM in response to Elias Rahme

An error occurred validating the installer data. The download is either damaged or incomplete.

continuously coming, can you support how to install ??

Sneffels

Level 1

9 points

Nov 18, 2018 2:20 PM in response to Elias Rahme

I tried all of the solutions offered in this thread. No joy.

Took my MacBook over to a friends house and tried it on his wifi and different ISP. No problem, fully installed Mojave and it works great.

So that means I have to suspect either my router, or my ISP. Can't imagine it being an ISP problem. Any ideas on what the router problem might be? I have a Linksys AC2600 router. My MacBook can use either wired or wifi connection(s).

jinsonkv

Level 1

4 points

Dec 4, 2018 5:43 AM in response to Elias Rahme

I also got the same error while installing the new OS.

I tried every tip mentioned on this page. macOS Mojave install error

Tried install after restarting (Not Worked)
Change My existing WiFi and connect with Airtel 4G dongle (not worked)
Create new admin (didn't work)
Disable Automatic Proxy Configuration (didn't work)

Finally, find my own way to solve. I removed the existing installer and reinstall from App store. Solved my issue. A more detailed guide is here. macOS Mojave install error

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Mojave Installation - An error occured validating the installer data. The download is either damaged or incomplete.