Update README.md

README.md

@@ -7,15 +7,15 @@ My hackintosh journey with the Dell Optiplex 7020 SFF/MT.
 
 ### Intro
 
-This is ~~not~~ almost a complete guide. Some hackintosh experience is a must, I'm going to assume you have a working macOS (real or in a virtual machine) though I will try to include Windows where possible. This guide has been tested with macOS Catalina and Big Sur.
+This is ~~not~~ almost a complete guide. Some hackintosh experience is a must, I'm going to assume you have a working macOS (real or in a virtual machine) though I will try to include Windows where possible. This guide has been tested with macOS Catalina and Big Sur but should work older version too. For the time being please stick with Catalina as Big Sur is still in beta testing. Your build will be much more stable and reliable.
 
 For those with some experience the EFI folder itself should be enough to get going. But I suggest you read on anyways, there are quite a few differences with other methods to keep the setup as vanilla as possible. Many questions will be answered and issues resolved if you read all the sections at least once.
 
 I suck at writing documentation but I need to keep track of things I do for myself and keeping track of progress in guide form it can also help others, hopefully. I've learned a lot in the passed week thanks to all the great guides and awesome software developed totally free by the community. I want to give back and share my findings and journey with all of you.
 
 Please only use this for clean installs, or updating an existing OpenCore install. I replaced my Clover at first and the system wasn't as fast as when I tried a clean install to test my EFI folder before using it on other 7020 boxes. The difference was quite noticeable. So only do a clean install if you're coming from Clover and just import your user data/apps once installed. This will ensure maximum performance. Still want to replace Clover? Read [this](https://dortania.github.io/OpenCore-Desktop-Guide/post-install/nvram.html#cleaning-out-the-clover-gunk) and [this](https://github.com/dortania/OpenCore-Desktop-Guide/tree/master/clover-conversion) on how to do it.
 
-> Note: If you've used a version prior to the 15th of July 2020 it is best to double check your settings and/or start from scratch as a lot has changed.
+> Note: If you've used a version prior to the 1st of August 2020 it is best to double check your settings and/or start your EFI from scratch as a lot has changed.
 
 ## Index
 * [BIOS settings](#bios-settings)