Hello there I have recently been noticing that my MacBook freezes every like three or four days once and I have to hold the power button in order to hard reboot it and then it works fine again afterwards. I am not sure what is going on, could it be that I am using beta version of Mac OS X? I like to stay on the latest update possible which is why I am on High Sierra Version 10.13.4 Beta, but if that could be the issue then I don't mind going back to a more stable version. I often use Onyx in order to clean my MacBook up and I recently purchased an external HDD where I moved all the non-essential, bulky data so my SDD (besides the Bootcamp partition) has about 102GB of free space which is more than enough. Thank you!