docs: added more information to the brew page

docpages/install/install-brew.md

@@ -4,11 +4,12 @@ To install D++ from brew, follow the steps below:
 
 ```bash
 brew install libdpp
-
 brew link libdpp
 ```
 
-This command will install libdpp and setup links so it can be used correctly.
+This command will install libdpp and setup links.
+
+If it can't detect libdpp, please do `brew update` and repeat the steps above.
 
 You will now be able to use D++ by including its library on the command line:
 
@@ -26,6 +27,6 @@ brew unlink libdpp
 brew uninstall libdpp
 ```
 
-\note As a precaution, double check inside `/opt/homebrew/lib` and `/opt/homebrew/include` to make sure that libdpp does not exist. If it does, remove files/folders relating to libdpp. If there are files left here and you don't remove them, you may see issues arise with different versions of D++
+\note As a precaution, double check inside `/opt/homebrew/lib` and `/opt/homebrew/include` to make sure that libdpp does not exist. If it does, remove files/folders relating to libdpp. If there are files left here and you don't remove them, you may see issues arise with different versions of D++. Sometimes, it may still act like some version of D++ exists, if it does that then please restart your system!
 
 **Have fun!**