How do I revert to version 18 from version 19?

Firefox Version 19 does not support Norton Toolbar, which I use heavily. I missed this and let Firefox update to V19. Now I want to get back to where I was.

What version of NTB do you have? Mine is 2013.2.4.2 and it refuses to go higher. Liveupdate says it's the latest and will not upgrade.

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How do I revert back to Lion from Mavericks?

How do I revert back to Lion from Maverick? Maverick does not support our server.

If you do end up needing to go the erase and re-install route because you do not have current backup to restore from, ensure that you make a clone or Time Machine copy of your current setup before doing the erase and re-install of Lion as the erase process will delete all your data.

HT201364 How can I revert to OS MAVERICK from OS YOSEMITE on my Mackbook Mid 2010?

How can I revert to OS MAVERICK from OS YOSEMITE on my Mackbook Mid 2010?

Do a backup, preferably 2 separate ones on 2 separate drives.
Revert to a Previous OS X - Yosemite
Revert Yosemite to Mavericks
If you do revert, I'd use Setup Assistant to restore your data. This process takes a while, so do it when you won't need the computer for several hours, based on my experience.

How do I revert to Snow Leopard from Mountain Lion? I do not have the setup disk that came with my MacBook but I do have the Snow Leopard software.

I upgraded to Mountain Lion and very much regret this move. I cannot use Parallels or Bootcamp for Windows XP which I need for some of my 'older' accessories. How do I revert from Mountain Lion back to Snow Leopard? I have the Snow Leopard software but I do not have the original setup software disk that came with the MacBook (leant to a friend and never seen again).

If you do revert to Snow Leopard, be aware of this "feature" I used with my 2009 MacBook Pro:
When it had the original OS (Leopard, I believe) I set up Bootcamp with Windows XP. I also installed Parallels and use the Bootcamp partition for Windows XP within Parallels.
I then upgraded to Snow Leopard and all was fine.
I then upgraded to Lion and still my Bootcamp partition works for Windows XP and also for Parallels.
I have not upgraded to Mountain Lion so I cannot speak to whether or not the Bootcamp paritition of Windows XP will continue to work. If you do and it works, LET US KNOW!

How can I Revert back to IOS7 from IOS8?

Hi Folks,
Is there a way that I can revert back to IOS7 from IOS8 after install on both iPhone and an IPad?
I did not back up either of these devices before doing the upgrade.
I know I should always back up before any updates, but I'm hoping the fact that I did not might be of help in my case.
Any help would be appreciated.
BTW: why do I want to do this? Ever since going to IOS8 my devices have become much slower to start up and also seem jerky during operation.
I have two iPhone 4S's and one iPad

Note that what Allan is suggesting is a way to resolve your issues. It will not downgrade your software version.

How do I revert back to Leopard from Snow Leopard?

I've been searching for days on a way to do revert back to Leopard from Snow Leopard (install Leopard over Snow Leopard).
I recently upgraded to SL and have had enough problems with applications that at this point I want to just revert to Leopard and wait a few months until I permanently upgrade.
I tried placing the Leopard install disk in and got as far as rebooting. Once it rebooted to begin installation it did this weird grey screen and force me to restart manually - it continued this in a loop until I removed the disk; which allowed me to boot back up in SL.
Is there a way to do this other than doing a full uninstall wiping all my data? If that is the only option, is there a easy way to transfer my data (Time Machine maybe or something else?)

I would transfer my data manually to a partition on an external firewire drive. Then, I would clone my SL installation to another partition of the drive. Next, I'd start up to my SL installation DVD and use Disk Utility to erase my internal. Afterward, I'd quit Disk Utility and quit the installer. Then, I use my Leopard install disk to reinstall Leopard. Since you are having app problems, I reinstall my apps using, among other things, the app disk that probably came with Leopard. Copy your data back, and you are good to go.
Message was edited by: donv (The Ghost)

How can I revert to Snow Leopard from Mountain Lion on a 2013 iMac?

I have a brand new 27" 2.9Ghz iMac, bought a few days ago, equipped with Mountain Lion. I'm using it for recording, and at the time, my recording software and hardware are incompatible. On Snow Leopard, however, it all runs flawlessly. I know I can't simply revert to Snow Leopard, as there is some sort of firmware that blocks these types of downgrades. Can I partition the internal hardrive and install Snow Leopard and boot from that partition? I have no real use for Mt. Lion for the time being, so I wouldn't need to boot them both simultaneously or even go back and forth. I just want Snow Leopard...any help would be much appreciated. Thanks

Welcome to the Apple Support Communities
You have different problems with a Late 2012 iMac and Snow Leopard:
1. The firmware doesn't allow you to run it.
2. Snow Leopard isn't compatible because it hasn't got the drivers for the hardware of the iMac. Furthermore, you can only run OS X 10.8.1, 10.8.2 or 10.8.3 on a Late 2012 iMac at the moment, because older versions haven't got the drivers it needs.
3. It's illegal.
As you can see, you can't run Snow Leopard natively. If this is a requirement, I suggest you to return your iMac and search a Mid 2011 iMac with Snow Leopard (there are some Mid 2011 iMacs that came with Snow Leopard, although most of them came with OS X Lion). If you don't find anything, buy a Mid 2010 iMac.
Another possibility is to buy Snow Leopard Server and install it on a virtual machine, but I doubt it's legal

How does one revert to Mountain Lion from Mavericks?

I got a new iMac a week and a half ago. It was running Mtn Lion, with i73.5, 8gb ram. I upped the memory to 16gb and installed Mavericks.
Now I have some issues that others are experiencing with Photoshop: some keyboard shortcuts not working, strange cursor behavior. There are some other things, just within my computer's behavior, that I'm not sure aren't related to Mavericks, as well, but since I've never worked on a Mac before last week, I just don't know.
The problems seem to be fixed, as reported by others over in Adobe forums, by reverting to Mountain Lion, and waiting for bug fixes in Mavericks.
I am new to the Mac world so I'd appreciate some detailed advice on the best way to do that.
Thanks for your help.

You should be calling AppleCare regarding problems with a new Mac. Telephone support is free for the first 90 days of ownership.
Various Adobe apps have had problems with Mavericks. Apple can't fix Adobe's problems. Consult Adobe for support options.
To revert to an earlier OS X version read: Revert to a previous OS X version

How can I revert back to Yosemite from Windows 8.1?

Looks like I've really screwed up this time. I was trying to set up Windows 8.1 on my iMac Yosemite) and decided to use boot camp. After 8.1 was installed I wanted to go back to Yosemite but can't seem to do it. Is there no way to return to Yosemite from boot camp? I know the drive was partitioned into OS X and Windows sections and when I reboot holding down the option key, there is no partition for OS X shown. Please help.

Please see Boot Camp for comments.

How do I revert to Snow Leopard from 10.7.4?

I have a Time Machine back-up of all my files on an external HD but, unfortunately, done AFTER installing 10.7.4 (which is a REAL BUMMER!).
If I reformat my MacBook Pro and do a clean install of 10.6.8, will it allow me to recuperate all my mail and docs backed-up in 10.7.4?
I mean, at a certain point, will it ask if I want to get my stuff from some other disk of from a Time Machine back-up?

That of course did not answer eve the begnnning of my question, since Mail in all the windoz-like "lions" is NOT compatible with Snow Leopard Mail, and a MAJOR workaround is needed.
Anyway, I solved ALL of my problems and UPGRADED TO SNOW LEOPARD, a much faster mac-like system that doesn't eat your RAM, you battery and is much less intrusive than BOTH lions, which are windoz-like, slow, eat memory and battery and...it's your falut, just like in PC H*E*L*L*...

How do I revert to Snow Leopard from Yosemite on late 2008 MacBook with no optical drive?

Late 2008 MacBook. I don't need to back up, just to go back from Yosemite to Snow Leopard without a working optical drive.
Thank you.

If you have a Time Machine backup from Snow Leopard, then use it to restore from. Other than that, you will need to get an optical drive and run your install disks that came with your computer. Of course, you will need your Snow Leopard updater if you still have it since you can't get it from the App Store.
I may be wrong about it not being available. I found a like from apple where you can still purchase it. It may still work.
http://store.apple.com/us/product/MC573Z/A/mac-os-x-106-snow-leopard

How to I revert to version Mozilla 6.0? (screengrab is incompatible)

I would like to download and reinstall Mozilla 6.0 or the last version just prior to the 7.0.1 release until the incompatibility issue with Screengrab is resolved.

Downloaded and installed FireFox v5.0 now and Screengrab is working again!
Thanx for the assistance, U R supper!! :-)

How do I revert back to Aperture from Photos?

I opened up my Aperture library in Photos since I was under the impression that it was replacing iPhoto and Aperture, but was disappointed to find a large number of Aperture editing features missing. I suppose this means I need to find a replacement like Adobe Lightroom, but I was hoping to go back to Aperture while I researched alternatives. When I opened Aperture back up my library was empty. I know it's on my computer somewhere, so I'm not panicking, but what are the steps to get your old Aperture library out of Photos and back into Aperture? Thanks!

I upgraded to Yosemite and I was shocked that the OS don't let me use Aperture anymore. The app is still installed on my computer but the OS refuses to start it. Now I have to use the useless Photos app. This is not an upgrade but a downgrade, because Photos misses essential features, for instance comparing two pictures next to each other, good advanced searching by keywords (i.e. with more than one search field), easy editing of keywords, applying keywords to a collection of pictures instead of one, like Aperture does, etc etc. Apple forces users to downgrade to Mavericks or to buy Adobe Lightroom. It is a SHAME.
I want one of these things:
- A better Photos with (at least) the functionality of Aperture. Otherwise it is not an upgrade!
- Use Aperture again under Yosemite. Does anyone know a trick to do this?
Apple PLEASE!

How do I revert to abackup from time machine? The backups prior to Lyon install are not available - restore button is not active. I wish to return to Snow Leopard.

How Do I revert to Snow Leopard from Lyon?
The backups prior to Lyon install are not available... the restore button is not active.
thanks!

You need to do a full system restore from your last Snow Leopard backup.
See #14 in Time Machine - Frequently Asked Questions.

Hi. My 2013 MacBook Air has suddenly reverted to a previous Excel spreadsheet (from May). I use the same spreadsheet several times a day and hit cmd 's' every 5-10 minutes. How can I find the version I was using yesterday?? Please help. Thanks

Hi. My 2013 MacBook Air has suddenly reverted to a previous Excel spreadsheet (from May). I use the same spreadsheet several times a day and hit cmd 's' every 5-10 minutes. How can I find the version I was using yesterday?? Please help. Thanks

Might be something for you here > Automatically save and recover files - mac excel

How do I revert to version 18 from version 19?

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