How to Rollback from Unity4 to Unity3.5 ? Macbook pro

Unity Engine
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1

Hi,

I’m running Unity4 iOS Pro but it doesn’t like Vuforia AR , so I have to roll back to Unity 3.5 :frowning:

I tried loading Unity3.5 but I get this error when I start it.

type == kMetaAssetType pathName.find (“library/metadata”) != 0

When installing Unity, there’s no option where to install to apart from choosing simply “HardDrive”. then it simply loads.

I tried loading onto my spare HardDrive but I get the same error.

I was hoping there might be a way to have both versions loaded on the same machine.

I seriously need to sort this asap… massive deadline looming ( Wed. morning I have a client Meeting )

Any help would be really appreciated.

specs: MacBook Pro 16g RAM 750g SSD Unity iOS Pro.

2

I managed to insall both 3.5 and 3.6 on my mac mini. If it doesn’t prompt you for an install directory, you might need to rename the folder of the existing version first. It should have a completely clean directory to install into. Hope that helps.

3

Without backup of the project folder, it’s probably impossible to revert back to 3.5. 4.0 converts your project to newer format, and 3.5 cannot read that anymore. It does say so when you open 3.5 project in 4.0. Of course you can import the assets and also scripts back into empty 3.5 project, but what ever you had on your scenes are out of reach I’m afraid.

But what kind of problems you had with Vuforia? I managed to get it working with 4.0, required few tweaks to AppController.mm, but otherwise it runs smooth.

As for having more than one Unity version installed, just follow what _Petroz said. Rename your “Unity” folder in Applications to for example “Unity3” or “Unity4” (depending of what you have installed now) and install other version after that. It creates new “Unity” folder, which you can also rename, if you like.