Wise Memory Optimizer is a Powerful Memory Cleaner for optimizing your Mac's memory.
Wise Memory Optimizer automatically displays the used, free and total memory of your computer upon deployment, along with a bar chart updated in real time.
It also gives you a list of usage-hogging software so that you know which apps are taking most memory. You may want to close such apps if not currently using them.
During the memory clean process, an older Mac may slow down until the cleaning process is finished.