Add Conda env deactivation to installer scripts

Avoids conflicts with existing Conda installations

start_macos.sh

@@ -4,6 +4,9 @@ cd "$(dirname "${BASH_SOURCE[0]}")"
 
 if [[ "$(pwd)" =~ " " ]]; then echo This script relies on Miniconda which can not be silently installed under a path with spaces. && exit; fi
 
+# deactivate existing conda envs as needed to avoid conflicts
+{ conda deactivate && conda deactivate && conda deactivate; } 2> /dev/null
+
 # M Series or Intel
 OS_ARCH=$(uname -m)
 case "${OS_ARCH}" in