Upgrade Xcode 8.3.1 to Xcode 9 - xcode

I am not having paid Apple Developer Account and using Xcode 8.3.1, Xcode 9 is released recently and i want to upgrade my Xcode but only download option is available. is it possible to upgrade or i have to download new one separately.

Open AppStore than Purchased and find the Xcode.It will have option of INSTALL click on this.It will update Xcode to latest one.In my case updated to Xcode9.
Appstore after installation.

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Updating xcode after upgrading MacOs operating system

I have just upgraded my MacOs operating system on one of my older machines from El Capitan to Big Sur. I subsequently tried to open xcode but I get the error:
In order to use “Xcode”, you need to update to the latest version. The version of Xcode installed on this Mac is not compatible with macOS Big Sur. You have “Xcode” 7.3.1. Download version 14.1 for free from the App Store.
When I go to the App Store, the only available xcode that I can see is 14.1 which is for Ventura and therefore not compatible with my current set up and so of no use. How to upgrade to say xcode 13, compatible with Big Sur? I hope it is possible without having to manually download xip file from developers section of apple.
The App Store will only let you download and install the latest version of Xcode.
You answered the question in the last sentence. Download Xcode from Apple's developer site. The site Xcode Releases has Apple's download links for every version of Xcode. Xcode 13.2.1 is the latest version that runs on macOS 11.

How can I have two versions of Xcode without conflicts?

My stable version of Xcode, the previous one to Xcode 8, launched two days ago, use provisioning profiles for APNs and many other data. I'd like to install Xcode 8 to learn about the new features but I'm scared about damaging my current working Xcode version because the last time I installed a beta Xcode version I remember I couldn't send packages from the stable version, something like files from two versions overlapped becoming "main files" those from the beta version.
I need precise instructions about how to install a Xcode beta version in El Capitan having and older working version without damaging anything.
By the way... is it possible to install Xcode 8 in El Capitan? And submit compiled app from this version?
You can download Xcode-beta 8 from https://developer.apple.com as usual and you can Xcode 7 & 8 side by side as they have different names Xcode-beta and Xcode (see image)

What will happen to my old xcode when I download new xcode?

The question is in the title already. I have an old XCode. Then there is a software update message on my Mac. It said that there is a newer version of XCode. If I download the new XCode, will my old XCode be deleted? Or I will end up with 2 XCodes?
If you are upgrading Xcode through the Mac App Store then it will replace your old version of Xcode. However, if you download a beta version then you can have the beta version and the production version on your machine both at the same time.
For example during the iOS 8 beta period, I had the production version of Xcode 5 on my machine and also Xcode 6 beta (all versions) installed at the same time.
However, either way you really don't need to fret because you can always download the older versions of Xcode through developer.apple.com. Just look in the "Downloads" section and click the "Looking for an older version of Xcode?" link which takes you to: Downloads for Apple Developers
It depends. If you install a GM version of Xcode it will replace your current GM version, and it will be named "Xcode". If you install a beta version, it will install a separate Xcode, with a beta mark appended to the name, eg. "Xcode6-Beta5".

Downgrade Xcode 5 to Xcode 4.6.1

I have been trying to research a way that I would be able to revert back to Xcode 4.6.1, I can't seem to find a solution.
I've seen that in the past people have downgraded their Xcode.
Is there a way that I can downgrade Xcode 5 back to Xcode 4.6.1?
I have older versions of apps which clients do not wish to upgrade. However I still need to make amendments to theses applications. I need them to remain the same.
Is there any way that I can downgrade Xcode?
Move Xcode 5 to the Trash. Download and install Xcode 4.6. You can download older versions of Xcode from the following URL:
https://developer.apple.com/downloads/index.action
You can also have both Xcode 4 and 5 installed. You will have to rename your existing Xcode 5 app from Xcode to another name like Xcode5 before you install Xcode 4.6 in the Applications folder.
I followed your instruction to downgrade xcode 5.1 to xcode 4.6.1. The steps seems to work, however, when I try to install the command line tool, the Components tab of the Downloads preferences panel shows "No components are available". How do I get the command line tool to show up in the component panel?
Before the downgrade, with xcode 5.1, I did "xcode-select —install" to install command line tool. I assume it has been removed when I dragged the xcode 5.1 to the trash.

Uninstall xcode 4.5 (iOS 6)

Just realised I've made a mistake of updating xcode 4.5 (iOS 6) as it causing problems.
How to uninstall xcode 4.5 (iOS 6)? safely? as iOS 6 is beta. I want to go back to xcode 5.1.
iOS6 is no longer beta. So if you installed Xcode 4.5 from the store, you already have the release version of Xcode 4.5. If not, get it from the store.
If you want an older version of Xcode, look here.
There are cases where you may not want to upgrade to the latest version of Xcode.
In my company there are still customers with iPhone 3 that are running iOS 4.2.1 and Xcode 4.5 won't generate code for it. Xcode will generate for 4.3 upwards.
Surprisingly I have an iPhone 3 (A1303) that has been upgraded to iOS 6.0 and Xcode won't generate code for that either.
So, for those that do need to downgrade, you use the link that #leo posted to get hold of the dmg for the version of Xcode you want (4.4.1 probably) and mount it. You then find the existing Xcode (in your application folder) and drag it to the waste bin, then drag the downgraded Xcode to the application folder. You may need to re-install the command line tools, if you use them. Make sure you get the version for your Mac's OS.

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