https://satsuite.collegeboard.org/sat/device-lending
From the website:
College Board is committed to helping students take the SAT, regardless of access to a device.
You can take the SAT with any personal or school-managed Windows laptop or tablet, personal or school-managed Mac laptop or iPad, or school-managed Chromebook (personal Chromebooks aren't permitted).
Check out SAT Device Readiness to see if your device will work.
If you don't have access to a device and cannot borrow one, College Board may be able to lend you a device to use on test day. Follow the steps below.
NOTE: Submitting a request does not guarantee that College Board will provide you with a loaned testing device.
First, we recommend you check to see if you can borrow a device that meets the device requirements from your school, a family member, or a friend so you can download the Bluebook app and get familiar with the device. If this isn't an option, you can request to borrow a device from College Board.
Register for an SAT test day that is at least 30 days away to allow adequate shipping time for the device. During registration, when asked what device you intend to use on test day, select I don't know if I have access to the necessary device.
After you've registered, and at least 30 days before your test day, go to My SAT and select Request a device. You will need an adult who isn't a family member to verify your eligibility (for example, a teacher, counselor, advisor, or school administrator).
This option only appears after your registration is complete. You must complete your request at least 30 days before your test day to allow adequate shipping time. Submitting a request does not guarantee that College Board will provide you with a loaned testing device. If approved, we will make a device available to you at your test center on test day.
On test day, arrive 30 minutes before the standard check-in time. You'll pick up your loaned device, sign in, complete exam setup, and then get an admission ticket before the test starts.
If you completed registration without selecting I don't know if I have access to the necessary device or don't see the option to Request a device in My SAT, send us a message. You can also call us at 866-630-9305 (U.S.) or +1-212-713-8000 (international).