thanks for replying! my current version is 10.13.2 . how do i check if utorrent is compatible with my version of mac? also im hesitant on updating my mac as I have been told that my macbook could slow down due to these updates?
This site is helpful in determining what applications are compatible with various versions of the Mac OS (and some other Operating Systems):
https://roaringapps.com/apps
However, that table indicates that uTorrent is compatible with High Sierra, yet as Cory states, the site itself only indicates Sierra compatibility.
Also, a number of applications have a Check Update option under the file menu. I use Transmission for "torrenting" (similar to uTorrent), and there is a "Check Updates" option under the File menu). BTW, Transmission is compatible with OS 10.7 or later. It actually works quite well, at least for me.
Yet, sometimes that "Check Updates" option is not up to date. For Transmission, when I click on "Check Updates", it says that I am current with V2.9.2. However, in visiting their site (Cory's excellent suggestion), it states that V2.9.3 is available (was actually released back in January). So, I have downloaded that version.
A third choice is to visit this site:
https://www.macupdate.com/
That is a good site to see if there are any updates, but do not download any updates from it. It is always best to get such updates from the company's/developer's site.
As for High Sierra, the latest version is V10.13.4. The easiest (and safest) way for you to update is to download the OS 10.13.4 Combo Updater, available form here:
https://support.apple.com/kb/DL1959?locale=en_US
This actually contains all the updates for High Sierra to date, and thus in your case it would install the ones for V10.13.3 and V10.13.4. I have always used Combo Updaters, and they work well.
As for a machine's performance, are you doing any disk cleanup/maintenance/repairs, from a software perspective? Such tasks can definitely help, and there are some excellent programs available (both free and commercial) that can help. Also, look inside your Downloads folder. That is where a lot of "stuff" can pile up.
It is also good to have a "good amount" of free space available on your internal drive. Myself, I am only using about 35% of the space available on my 2 Macs (a late 2012 Mac Mini with a Samsung 840 Pro 256 gig SSD, and a mid 2017 13" MacBook Air with a 252 gig SSD). The disk cleanup task I mentioned above can certainly help with that.
Finally, are you making backups to an external device? That of course is necessary.