Accidentally ran pod update instead of pod install. Is there any way to revert?

The best way is to remove the pods directory from your project and update and install it again.

rm -rf Pods 
bundle exec pod repo update
bundle exec pod install

You can go through the version changes in the pod install's output and rewrite your podfile with the desired versions.

For example:

In pod install output below, SwiftSpinner was updated from 0.9.5 to 1.0.2

enter image description here

Therefore, in the podfile change the line

pod 'SwiftSpinner'

pod 'SwiftSpinner', '0.9.5'

and run pod update again.

Now, you might get errors reverting certain pods:

[!] Unable to satisfy the following requirements:

- `Realm (= 1.0.2)` required by `Podfile`

- `Realm (= 1.1.0)` required by `Podfile.lock`

In such a case, close Xcode, delete your podfile and run pod install again.

If you use git or other version control system, just reset changes in Podfile.lock and run $ pod install in terminal.

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