Lightoom struggling ?!

Hello everyone, my first post here. I am really frutrated with how slow my Lr is on iMac that i expected should handle it with ease. Here are my iMAc specs and please tell me if that is too weak to run the Lr smoothly(no lagging while scrolling through presets, exporting or any function for that matter). If it turns out my specs are outdated/no enough please share with me what specs are recommended and will run Lr like a butter. Thank you

27" 2017 Retina 5K

4.2 GHz Quad-Core Intel Core i7

Radeon Pro 580 8 GB

64 GB 2400 MHz DDR4