where to download official Yosemite installer???

Loa

macrumors 68000
Original poster
May 5, 2003
1,589
45
Québec
Hello,

This it what looks like a very stupid question, but since I can't find the 10.10 installer on the app store (canadian) or on Apple's website, I'm stuck.

I'm looking for an official 10.10 install.

thanks.
 

chrfr

macrumors G3
Jul 11, 2009
8,311
2,595
Hello,

This it what looks like a very stupid question, but since I can't find the 10.10 installer on the app store (canadian) or on Apple's website, I'm stuck.

I'm looking for an official 10.10 install.

thanks.
If you don't already have 10.10 in your purchased section of the App Store, there is no official source for it so you'd have to source it elsewhere. You can still get 10.11.6, El Capitan, which will run on all the computers that will run 10.10. That is available here: https://support.apple.com/HT206886
 

Loa

macrumors 68000
Original poster
May 5, 2003
1,589
45
Québec
Thanks for the info (but I don't get why Apple makes getting and running old things so complicated).

I found my Yosemite purchase in the list, so thanks.

But my concern is that I tried to install 10.10 on my old macbook using a usb drive and I got this message:

“This copy of the Install OS X [OS X Name] application can’t be verified. It may have been corrupted or tampered with during downloading.”

Think redownloading it will fix that?
 

chrfr

macrumors G3
Jul 11, 2009
8,311
2,595
Thanks for the info (but I don't get why Apple makes getting and running old things so complicated).

I found my Yosemite purchase in the list, so thanks.

But my concern is that I tried to install 10.10 on my old macbook using a usb drive and I got this message:

“This copy of the Install OS X [OS X Name] application can’t be verified. It may have been corrupted or tampered with during downloading.”

Think redownloading it will fix that?
It may work again if you redownload. Some older installers have expired signatures which will give that error.
 

Fishrrman

macrumors P6
Feb 20, 2009
17,474
5,676
OP:

I heard of "a trick" you might try with that Yosemite installer that's throwing up the error message. I can't confirm that it works, or not. You'll have to try it and get back to us.

That trick is:
1. Go to the "date and time" preference pane and UNCHECK the option to set date and time automatically.
2. Now, manually "set back" your Mac's clock to, say, 2012, 2013, something like that.
3. NOW try to run the OS installer

Does this change anything?

Doing this will HURT NOTHING, and if it doesn't work, just re-enable automatic date and time (which you need to do anyway AFTER the OS install)
 

Loa

macrumors 68000
Original poster
May 5, 2003
1,589
45
Québec
Very interesting trick. Never would have thought of it, but sadly I redownloaded the installer and everything worked with that new copy.
 

AnonMac50

macrumors 65816
Mar 24, 2010
1,477
279
Make a backup copy of that Yosemite installer. I could have sworn I previously saw an App Store link for Yosemite after High Sierra was released, but I may have been imagining things. I have all the OS X Installers backed up just in case I need/want them again.
 
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Loa

macrumors 68000
Original poster
May 5, 2003
1,589
45
Québec
Make a backup copy of that Yosemite installer.
I have them all going back to 10.6. But what I didn't say in the original post is that the reason I wanted to download 10.10 was because I was unable to use the old one I had. I got an error message telling that they were too old. But Fisshrman offered a tip to set the clock back a couple of years. Maybe that could work with old installers.
 
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chrfr

macrumors G3
Jul 11, 2009
8,311
2,595
I have them all going back to 10.6. But what I didn't say in the original post is that the reason I wanted to download 10.10 was because I was unable to use the old one I had. I got an error message telling that they were too old. But Fisshrman offered a tip to set the clock back a couple of years. Maybe that could work with old installers.
Redownloading the installers will work too as that gets a new signature on the installer app.
 
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AnonMac50

macrumors 65816
Mar 24, 2010
1,477
279
I have them all going back to 10.6. But what I didn't say in the original post is that the reason I wanted to download 10.10 was because I was unable to use the old one I had. I got an error message telling that they were too old. But Fisshrman offered a tip to set the clock back a couple of years. Maybe that could work with old installers.
Ah I see, yeah I redownloaded my installers when that happened, but the date and time trick should work too.