Update Installation documentation

docs/INSTALL.md

@@ -91,6 +91,10 @@ The Install command is:
 
 **Once you have installed Python via Brew, you will need to run both Python and PIP with commands that include the full version numnber. (eg: python3.12 and pip3.12)**
 
+3) Install Rust (Optional, but needed for requirements-full modules)
+
+   curl https://sh.rustup.rs -sSf | sh
+
 ## 3) Install requirements via Python Pip ##
 
 Once both Python3 and PIP have been installed, you can install the requirements for BTCRecover.
@@ -106,6 +110,10 @@ If when run this command, you get an error message similar to **error: externall
 
 Note: If you use Python for other things beyond BTCRecover, then the `--break-system-packages` could cause other issues, but in such situations, managing your python virtual environments for your specific system is beyond the scope of this documentation.
 
+If you are running Python 3.13 and get a build error you may also need to set the following environment variable.
+
+   export PYO3_USE_ABI3_FORWARD_COMPATIBILITY=1
+
 ### Packages for Extended Wallet Support
 Depending on your wallet type, you may also want to install the packages required for full wallet support. This is a much larger download and may also require that you install additional software on your PC for these packages to build and install.