If that does not work buy an External SSD and boot it from the Startup Manager Startup Disk. Reinstall the OSX for the Recovery Partition. If so replace it with a USB3 or ThunderBolt (kinda this is not much of an option) - Any recommendations on manufactures? Maybe USB2 attached storage is slowing down the whole system. Buy Apple 27 iMac Desktop Computer (Late 2013) featuring 3.2GHz Intel Core i5 Quad-Core (Haswell), 8GB of 1600Hz DDR3 RAM, 1TB 7200rpm Hard Drive. Remove the External Storage (Temporarily) and see if the behavior still occurs. My thoughts were to do the following steps troubleshooting: Logic tells me that there is enough RAM in the machine and a 7200RPM Drive is better than a 5400 RPM Drive but not as good as a SSD performance wise.Īt this point I do not want to make the performance worse by upgrading to Catalina by know eventually I will need to. The frustrating part is that it happens when opening applications, opening web pages, the Finder or just about anything. I run Clean My Mac weekly and the performance increases some but after a few days it seems we are back in the same place performance wise. Nvidia Geoforce GT755 (1GB) Graphics Card My Late 2013 27' iMac’s performance is starting to become very frustrating (Spinning Wheel).

Late 2013 imac 27