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While there has been nearly a whole year of delay since the end of life date for Windows 7/8/8.1 and macOS 10.13/10.14, soon the support is going to end for these OSes for real.

Steam Client Beta - October 2nd patch notes:

This version of the Steam client will no longer run on Windows 7 or Windows 8 [and on] macOS 10.13 or 10.14.

It is to be expected that the next stable update (after 1726604483) will carry out this change.

• Steam Client Beta - October 2nd
  
• Windows 7 and Windows 8 Support (archived[web.archive.org])
  
• Steam macOS 10.11 and 10.12 Support
  
• Steam macOS 10.13 and 10.14 Support

---

I am a Linux user. The only instances of Windows 7 I have at home are installed on another computer not used for gaming and a virtual machine without 3D acceleration. While some things will be tested, I cannot guarantee instant or reliable support in case you get stuck in the process.

Please understand this, and don't hesitate to ask elsewhere and link to other resources that could complement this guide, especially if things drastically change at some point.

Also, do it at your own risk! Steam is, after all, software that is always connected to the Internet, and it may be a bad idea to keep that running in the background if you can't be sure if it's secure.

There are a couple of methods to downgrade the client. All of them require the Steam client executable to be present.

Note: Skip this part if you already have a working Steam installation.

It is possible to use Steam's updater with nothing more than the main Steam executable. If you don't already have a working Steam installation (or the bricked update made the main executable useless), here's how you can get it.

The executable version doesn't matter. These files have been archived using Wayback Machine. Obtain an archived version for:

• Windows[web.archive.org]
  
• Linux[web.archive.org]
  
• macOS[web.archive.org]

Then, during or after download, remove the SHA1 file hash from the name (everything after .zip), unzip to the location you wish Steam to be installed in (or has been), and proceed with the instructions below.

Using copies of Steam packages and manifests that have been archived online, it is possible to have the client downgrade itself.

Internet Archive Wayback Machine archives pages and files directly, which ensures that they have not been tampered with, and that is the source this method uses.

The procedure:

1. If you previously enrolled to Steam Client Beta, launch Steam with -clearbeta and dismiss the "Steam needs to be online to update" error
   
2. Exit Steam
   
3. Launch Steam with:
   
   -forcesteamupdate -forcepackagedownload -overridepackageurl http://web.archive.org/web/<date>if_/media.steampowered.com/client -exitsteam
   — replacing <date> according to The Downgrade Table section under Wayback Machine date
   
   Note: If this doesn't work, also append -textmode
   
4. Steam should downgrade itself and exit
   
5. Done! Start the client, and it should work
   Note: On Windows, if you get a dialogue about the Steam registry path not being writable, click Repair
   
6. Before launching Steam another time, create steam.cfg as per section Preventing Client Updates

If step 3 fails (less secure, relies on manual backups rather than Wayback Machine):

1. Navigate to this page[archive.org]
   
2. Use The Downgrade Table and find the manifest version you need
   
3. Navigate to the directory of the OS you are using (steam_client_<your_OS>), and under it, navigate to the directory of the version you want to use
   
4. Copy the URL for step 3 of The quick, online way

Note: For this to work, ALL packages and the package manifest must be archived as per the client manifest to a file server or a digital archive service such as Wayback Machine. Each "file" entry corresponds to a path under http://media.steampowered.com/client/.

If you made a backup of Steam packages, or took someone else's at your own risk, this is how you can restore the update.

The procedure:

1. Navigate to the Steam directory
   
2. Remove the contents of package folder
   
3. Copy backed-up packages to package
   
4. Launch Steam, let it update, and on the Extracting package... step, press Cancel
   
5. Remove package > tmp
   
6. Launch Steam again
   
7. Before launching Steam another time, create steam.cfg as per section Preventing Client Updates
   
8. Done!

If you give up, it is sufficient to do this and not lose any of your data:

1. Delete steam.cfg if it was previously created
   
2. Launch Steam with these arguments:
   
   -forcesteamupdate -forcepackagedownload -exitsteam
3. The client will exit; the next time you start it, it should be back to normal

If you need to downgrade your client, it is only natural that you don't want it to self-update right away.

Using steam.cfg, client updates can be prevented permanently.

1. Navigate to the Steam directory:
   
   • Windows 32-bit:
     
     C:\Program Files\Steam
   • Windows 64-bit:
     
     C:\Program Files (x86)\Steam
   ...and our special guests, since the procedure works the same way:
   
   • Linux:
     
     ~/.local/share/Steam
   • MacOS:
     
     ~/Library/Application Support/Steam
2. Create a new file, steam.cfg, unless it is already present
   
3. Paste this in:
   
   BootStrapperInhibitAll=enable
   This can be disabled by prepending the line with a # so that it is commented out (ignored) until needed.

Note: Manifest version corresponds to the Unix time the build was finalised, which can be used to determine the date.

steam_client_win32 - Windows
steam_client_ubuntu12 - Linux (regardless of distribution)
steam_client_osx - macOS

steam_cmd_win32 - SteamCMD Windows
steam_cmd_linux - SteamCMD Linux
steam_cmd_osx - SteamCMD macOS

Considering that the Steam backend is updated alongside the client, the version you choose to use may not be able to authenticate in the future. Since nobody knows how this will break in the future, there are two possible scenarios (or three, if you lose your current login entirely). However, there is nothing you need to do in advance, as reverting possible issues is easy to do.

This is the ideal outcome in case Valve accounted for the situation. The client will simply launch in offline mode and all installed games and applications are ready to be used. However, it may take a while longer for the client to load, as it is trying to connect and authenticate.

Improvement: In order for Steam to load more quickly, simply follow the procedure under section Extras, Keeping the client offline forever.

The login window shows up, containing the login prompt or account switcher. Since the client cannot authenticate, it may seem like it's a dead end, but it's actually very easy to overcome this issue.

Solution: Simply follow the procedure under section Extras, Keeping the client offline forever. Whether the account is currently logged in or not, as long as it has been logged in to once, editing loginusers.vdf is sufficient to log in offline.

Note: For the helper device, if Steam is already being used, make a backup of Steam and wipe it, then restore afterwards.

If the latest version of Steam cannot be run on your preferred device, running Steam on a device using a supported OS ("helper") can be used to authenticate to Steam instead, transferring all necessary files for the client to log in offline.

The procedure:

1. On the unsupported device, perform the client downgrade to the latest Steam version it supports if it is not present/operable
   
2. On a supported ("helper") device, install Steam and log in to your account
   
3. Exit the client
   
4. From the Steam install directory, copy appcache, config, steamapps (optional), userdata and local.vdf
   
5. Transfer these files to the unsupported device, into the Steam install directory
   
6. Follow the procedure under section Extras, Keeping the client offline forever
   
7. Making sure that Steam works on the unsupported device, uninstall Steam from the supported device to remove leftovers, if needed

Additional steps for specific versions:

• 1570046470 or older: packageinfo.vdf needs to be converted using Auto PackageInfo Converter

Given that Steam is constantly tweaked and upgraded over time, outdated versions eventually stop being usable. Downloads/updates, and especially the ability to log in may stop working, rendering the online components of the client unusable.

However, it is likely that SteamCMD will continue working way past the "expiration date", so this is how you can use it to download/update games going forward.

While the client (service) will forever and ever stay a requirement for launching Steamworks API-powered games, or, rather, those that refuse to work without it, or additional DRM on top of it, downloading games should still be possible using SteamCMD. Considering it is an actively updated command line utility, there is no good reason to remove compatibility for older OSes, unless, perhaps, the web transitions to a new version of SSL that won't be supported on older OSes, or Valve compiles it against libraries that were never added to older OSes.

Moreover, with the industry transitioning away from older OSes... I guess you can imagine Steam might not exactly keep blooming with new game releases that can be played on them.

First of all, while it involves the command line and it is mainly used by developers and game server administrators, please don't be scared away. Yes, accomplishing things with it isn't a one click operation (until someone makes a batch script or software I may include here), but it is worth getting a hang of.

From the SteamCMD wiki page, under Downloading SteamCMD, download the zip archive and extract it to the desired location. For other OSes, follow the instructions on the page.

Anytime before launching SteamCMD, make sure to close any running instance of Steam in order to prevent it from interfering with the Steam installation.

For convenience, use whichever you prefer:

• Desktop shortcut
  After creating the shortcut, in the Target field, append:
  
  +login <username>
  — replacing <username> with your Steam username.
  
• Batch/shell script
  Going for this option most likely means you understand how it's done, and since this guide addresses multiple OSes, I will leave you to it. For now.

Launch SteamCMD as prepared earlier. If this is the first time you are launching it or any updates arrived since the last time you used it, it will self-update, so wait for that to finish.

You will be prompted to log in using your Steam credentials. Once you successfully log in, you will be presented with a Steam> prompt.

In order to learn the usage of commands yourself, use this command:
— replacing <query> with a search query or full command/convar name.

In order to prepare SteamCMD to be used for managing an existing game library, its steamapps directory needs to be linked into the SteamCMD installation.

Close SteamCMD, remove its steamapps directory, then run this command:

• Windows (may require running as administrator):
  
  mklink -d "C:\path\to\SteamCMD\steamapps" "C:\path\to\Steam\steamapps"
• Linux/macOS:
  
  ln -s /path/to/Steam/steamapps /path/to/SteamCMD/steamapps

The simplest way to download/update games is to use your Games page while SteamCMD is running. Picking download location and moving across library folders is unimplemented, but the Steam client can be used to accomplish that.

If you want to use the command line, in order to download/update games, use the command:
— replacing <appid> with the App ID of the game to download/update, shown in the Properties dialogue of each game under Updates, or in the URL of the Steam Community hub of the game (linked to in your Games page).

Additional arguments:

The simplest method is to press Subscribe on the mod you want, and the next time you use app_update, the Workshop item will be downloaded.

Otherwise, in order to manually download/update Workshop content, obtain the App ID of the game to download content for, and obtain the Published File ID from the end of the URL of a Workshop listing page.

Use the command:

Refer to Steam Workshop Implementation Guide > SteamCmd Integration.

Bug: force_install_dir removes all custom library folders, each folder will have to be re-added when Steam client starts (library_folder_add isn't even present in SteamCMD). This is presumably since SteamCMD always uses the main install directory first, edits the library folder configuration there, and only then switches to the forced location.

SteamCMD, by default, uses the location it's stored in. If steamapps directory is linked to an existing Steam installation's steamapps directory, it will use it as well, inheriting its custom library folders.

In order to switch to a different location, use this command:
— replacing <library_folder> with the path to the library folder to switch to. Enclose it in quotes ("D:\Some Path\Steam") if it contains spaces.

For additional convenience, for each library folder you have, you may create a copy of the shortcut you made, each with this argument appended to Target field:
Just don't run multiple SteamCMD instances at once!

What's safer than making client backups, especially if they are available to all? Here's how you can feel even safer and contribute, everyone wins!

If you want to create a backup of the last working Steam version, simply make a copy of the package folder, as well as the Steam executable.

This script was developed for use in a Linux terminal, and makes a local backup as well as requests remote archival (ex. to Wayback Machine), including SteamCMD.

Here are some extra procedures, for convenience.

Note: Don't do this unless the client stops being able to connect to begin with, otherwise downloads/updates, multiplayer and other online features won't be available!
Note: This only works for the currently logged in account ("MostRecent" = "1")! Switching is not possible offline.

This makes the client launch faster and make no connection to Steam (please confirm), which is beneficial if it cannot connect.

The procedure:

1. Navigate to the Steam directory, as outlined before
   
2. Enter config directory
   
3. Edit loginusers.vdf
   
4. Under the desired user's SteamID64 (identifiable by "AccountName"), make sure these options are set to "1", adding any missing options if needed:
   
   "RememberPassword" "1" "WantsOfflineMode" "1" "SkipOfflineModeWarning" "1" "AllowAutoLogin" "1"
5. Make the file read-only to prevent accidentally switching off "WantsOfflineMode" while using the client (ex. by using Steam > Go Online...)
   
6. If you haven't already, edit steam.cfg as per section Preventing Client Updates

• Universal
  Use this launch argument, read full explanation:
  
  -pretendeol-w10
• VGUI banner
  WIP, try this procedure
  
• Desktop UI (modern) banner
  WIP, hide .titlebarcontrols_OSEndOfLifeAlertsButton_1AcQ7 using the "Make webkit.css work again" procedure
  
  Another method (discovered by kojiro hyuga):
  

  引用自 kojiro hyuga：

  To remove countdown banner in new desktop UI:
  
  1. Go to Steam\steamui\chunk~2dcc5aaf7.js
  2. Find and delete following:
  
  ("#Steam_EOLAlert",t.daysUntilOSEndOfLife,t.strOSName)
  
  ().OSEndOfLifeAlertsButton

In order to use the VGUI-based UI (used before the 2023 revision), downgrade to version 1690583737 and launch Steam with steam://restartinuimode/vgui. It supposedly works on Windows, but seems to be unreliable on Linux.

Otherwise, downgrade to version 1689034492 and launch Steam with -vgui.

In case downgrading causes additional issues, they will be addressed here.

In order to keep using browser-based Friends, follow this guide:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3045036713

Direct URL to project page if the guide is down:
https://github.com/TiberiumFusion/FixedSteamFriendsUI

Additionally, it is accessible with a standalone browser here. Note that some functionality like in-game status and game invites won't work when using it outside of the client.

In the case of Firefox, PWAsForFirefox[addons.mozilla.org] can be used to more closely replicate the original experience.

Alternatively, old Friends List does still work to an extent. Activate it by using another switch, -nofriendsui, and in addition, move/remove the package directory (though moving/removing the manifest file is enough). This way, chat is mostly functional.

Some features, such as purchasing games, are disabled in some cases if the client version is too old. This check can be worked around by spoofing the version.

1. Navigate to Steam > package
   
2. Edit steam_client_<OS_type>.manifest
   
3. Replace the version number in "version" field, or remove it as such:
   
   "version" ""

Material:

• [Fan Art] I miss the old :steamhappy: by u/iksdeasdf

Testing/help:

• Bergamot
  
• tintingaroo
  
• EricFromSouthTown
  
• TiberiumFusion

Archivists:

• mv

While the comment section is open for everyone, due to the high volume of comments, it is advised to use the public forum instead. That way, it is easier to find previous cases so that the same questions don't need to be answered in full again.