Running macOS Monterey 12.7.6, which is still capable for most internet work but is not Apple's latest system and is out of support. You might like to try OpenCore Legacy patcher to upgrade further, or these machines also do great with Linux.
GAMERKING 1TB Mac SSD M.2 NVMe PCIe 3.0 Internal Hard Drive Replacement for Apple MacBook Air A1466 A1465 (2013-2015, 2017), MacBook Pro A1502 A1398 (Retina 2013-2015) Original Interface
Apple MacBook Air A1466 13.3" i5 Early 2015 High Sierra EMC2925
Apple MacBook Air A1466 250GB 4GB Core i5 120GB SSD CATALINA LAPTOP 2015 VINTAGE
Apple MacBook Air A1466 Intel i7 13.3 in 8GB RAM 512GB SSD macOS Big Sur 4650U
Apple MacBook Air A1466 Mid 2013
Apple MacBook Air A1466 2017 13.3" Laptop┃Intel Core i5 5350U┃8GB RAM┃256GB SSD
