<p>First, you need to upgrade to 1.35.3 for Preview or Preprod.
You will need the new configuration files for Preview or Preprod (<a href="https://book.world.dev.cardano.org/environments.html" rel="nofollow noreferrer">https://book.world.dev.cardano.org/environments.html</a>), and you need to delete the db folder and sync from scratch (which is very fast now, as the blockchains are small).</p>

CC BY-SA 4.0
2022-08-25T10:41:33.337Z
Thank you. I have follow-up questions:

1. Are there any `binary` or `executables` that are ready to download for MacOS, so I don't have to build using Nix?

2. What is the difference between Preview and Preprod? I read it [here](https://docs.cardano.org/cardano-testnet/getting-started) that the Preprod is still on Alonzo and not Plutus V2 updated
Dani Ihza Farrosi
CC BY-SA 4.0
2022-08-25T10:44:48.353Z
I don't know if you can find the binaries for MacOS.
The difference in explained in the link I gave you in the answer. And correct, preview is forked, preprod still in Alonzo.
George - APEX Stake Pool
CC BY-SA 4.0
2022-08-25T10:22:05.537Z
2022-08-25T10:22:05.537Z
George - APEX Stake Pool
<p>I have previously installed node 1.33.0, and now I've upgraded my node to 1.35.0. I already have a 'db' folder when I'm using 1.33.0. If I want to switch to Preview / Pre Production configuration and environment, should I create a separate 'db' folder and download the full blockchain from the beginning, or can I use my previous 'db' folder from the Legacy Testnet? Will it cause any conflict?</p>

<cardano-node><testnet>
How to switch from Legacy Testnet into Preview / Pre Production Testnet?
# How to switch from Legacy Testnet into Preview / Pre Production Testnet?

(Asked by: username_0 on 2022-08-25)

I have previously installed node 1.33.0, and now I've upgraded my node to 1.35.0. I already have a 'db' folder when I'm using 1.33.0. If I want to switch to Preview / Pre Production configuration and environment, should I create a separate 'db' folder and download the full blockchain from the beginning, or can I use my previous 'db' folder from the Legacy Testnet? Will it cause any conflict?

**Tags:** cardano-node, testnet

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## 1 answers

### Answer by username_1 on 2022-08-25. Score: 1

First, you need to upgrade to 1.35.3 for Preview or Preprod.
You will need the new configuration files for Preview or Preprod (<https://book.world.dev.cardano.org/environments.html>), and you need to delete the db folder and sync from scratch (which is very fast now, as the blockchains are small).

> **Comments:**
> **username_0**: Thank you. I have follow-up questions:  1. Are there any `binary` or `executables` that are ready to download for MacOS, so I don't have to build using Nix?  2. What is the difference between Preview and Preprod? I read it [here](https://docs.cardano.org/cardano-testnet/getting-started) that the Preprod is still on Alonzo and not Plutus V2 updated  
> **username_1**: I don't know if you can find the binaries for MacOS. The difference in explained in the link I gave you in the answer. And correct, preview is forked, preprod still in Alonzo.  

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