Same here. I decided to update from Mojave to the latest one which is BigSur on my mid 2014 13inch 8 gb ram 256 gb ssd 2.6 GHz. My macbook pro was running just fine on mojave i was hesitating because of the 32 bit and 64 bit part however I decided I will go for it to see what Apple has done to the newer Softwares. This is a Big disappointment Sur. This was not expected of apple to release an OS which is incapable. I understand my macbook is 8 years old but this Big'headache'Sur is lagging worst than windows. Actually windows 10 runs better on it. Be careful old macbook users, this is not for old machines. Everything feels so glitched out. Thank Fully I don't have anything on my macbook so I can downgrade to Mojave whenever I want and thats what I am going to do. Its a long process but better than a bag full of lagged up Laptop. I love Apple I hope they send me a new Macbook as an apology because that sort of Apology is Approved by me.