![IMac 21.5-inch Late 2009 - Mac OS High Sierra 10.13.6, Intel Core 2 Duo, 4 GB DDR3 RAM, 500 GB HDD, Nvidia GeForce 9400 256 MB VRAM IMac 21.5-inch Late 2009 - Mac OS High Sierra 10.13.6, Intel Core 2 Duo, 4 GB DDR3 RAM, 500 GB HDD, Nvidia GeForce 9400 256 MB VRAM](https://www.rdaxpress.com/uploads/3/1/6/7/31672951/s586650569732673968_p1469_i21_w2908.jpeg?width=2560)
IMac 21.5-inch Late 2009 - Mac OS High Sierra 10.13.6, Intel Core 2 Duo, 4 GB DDR3 RAM, 500 GB HDD, Nvidia GeForce 9400 256 MB VRAM
![Catalina 10.15.3 running decent on my mid 2009 iMac. Gonna max out the RAM to 8GB. 🤗 : r/CatalinaPatcher Catalina 10.15.3 running decent on my mid 2009 iMac. Gonna max out the RAM to 8GB. 🤗 : r/CatalinaPatcher](https://preview.redd.it/aqu0f6uoroo41.jpg?auto=webp&s=4c252b6db1a944eb16f06071ca37e5bcd7e4e10b)
Catalina 10.15.3 running decent on my mid 2009 iMac. Gonna max out the RAM to 8GB. 🤗 : r/CatalinaPatcher
![I give you Big Sur running on a 2010 iMac, running as smooth as ever! This machine refuses to die! Thank you to everyone involved! : r/BigSurPatcher I give you Big Sur running on a 2010 iMac, running as smooth as ever! This machine refuses to die! Thank you to everyone involved! : r/BigSurPatcher](https://i.redd.it/le96ir8him361.jpg)
I give you Big Sur running on a 2010 iMac, running as smooth as ever! This machine refuses to die! Thank you to everyone involved! : r/BigSurPatcher
![IMac 21.5-inch Late 2009 - Mac OS High Sierra 10.13.6, Intel Core 2 Duo, 4 GB DDR3 RAM, 500 GB HDD, Nvidia GeForce 9400 256 MB VRAM IMac 21.5-inch Late 2009 - Mac OS High Sierra 10.13.6, Intel Core 2 Duo, 4 GB DDR3 RAM, 500 GB HDD, Nvidia GeForce 9400 256 MB VRAM](https://www.rdaxpress.com/uploads/3/1/6/7/31672951/s586650569732673968_p1469_i20_w2754.jpeg?width=2560)