Question: my imac is very slow how can i speed it up?
Answer: Find resource-hungry processes. Some apps are more power-hungry than others and can slow your Mac to a crawl. ...  Manage your startup items. ...  Turn off visual effects. ...  Delete browser add-ons. ...  Reindex Spotlight. ...  Reduce Desktop clutter. ...  Empty the caches. ...  Uninstall unused apps.