I have a ten-year-old iMac that was running extremely slowly, with many applications freezing on a regular basis. I contacted Nerdcore in Hughesdale and was advised that my Mac would benefit from a memory upgrade as well as replacing the 1TB drive for a 1TB SSD. I took the Mac in and all upgrades were completed within 24 hours. The Mac now runs like a new machine! Nick, at Nerdcore, also gave me good advice on reducing the storage on my hard drive to further improve performance. I would strongly recommend Nerdcore to anybody with an old iMac that needs a new lease of life.