How can I reduce the 70 GB of storage that is classified as system space on my MacBook? Am using Mac Book Pro 2017 model 128 GB.Am using ios development purpose. but some time memory management alert. Here my mac using system space above 70 GB. How can i reduce my system space.
You can use the build-in Storage Management.app for inspecting what file is consuming large amount of disk space

Another software Daisy Disk is very useful for disk space visualising, so you can easily find out the large directories or files by checking the sector area (for directories that contains its files and sub directories)