space required to install big sur
Hi, I use macOS Catalina 10.15.6 on my MacBook Air 11" (early 2015), which has a 128GB SDD. Currently have about 21 GB free space. Planning to upgrade to Big Sur. Question is do I have the space to do this? Second, is it recommended - considering dated processor, lack of space etc?
MacBook Air 11″, macOS 10.15