Currently have a Macbook Pro Retina 13 inch Early 15 and haven't updated OSX in ages Just kept putting it off and here we are I've been running El Capitan since I got the laptop in late 15 Did some research and saw that Big Sur's been bricking some older Macbook models like the 13 and 14, sometimes the 15sMacBook Pro (Late 13, Retina, 13inch) Mac OS Catalina Processor 24GHz dualcore Intel Core i5 Memory 4GB RAM Graphics Intel Iris 1536 MB Storage 256 GB With Microsoft Office 19 Very Minimal Scratches (not visible) With 2 original apple chargers Battery 90% 459 cycles RFS Buying new laptop Brand Apple Model Number MacBook Pro (Late 13, Retina, 13inch) Ram (GB) 40GB SSD (GB) 2560GBMacBook Pro (Retina, 13inch, Early 13) Can Your MacBook run macOS Big Sur Well, If your MacBook is not a 13,14,15,16,17,18,19, or latest model, then it can't run Big Sur Can My Mac Run Macos Big Sur Macbook pro (retina 13-inch late 2013) big sur